lcd touch screen dead spot free sample

In this Arduino touch screen tutorial we will learn how to use TFT LCD Touch Screen with Arduino. You can watch the following video or read the written tutorial below.

For this tutorial I composed three examples. The first example is distance measurement using ultrasonic sensor. The output from the sensor, or the distance is printed on the screen and using the touch screen we can select the units, either centimeters or inches.

The third example is a game. Actually it’s a replica of the popular Flappy Bird game for smartphones. We can play the game using the push button or even using the touch screen itself.

As an example I am using a 3.2” TFT Touch Screen in a combination with a TFT LCD Arduino Mega Shield. We need a shield because the TFT Touch screen works at 3.3V and the Arduino Mega outputs are 5 V. For the first example I have the HC-SR04 ultrasonic sensor, then for the second example an RGB LED with three resistors and a push button for the game example. Also I had to make a custom made pin header like this, by soldering pin headers and bend on of them so I could insert them in between the Arduino Board and the TFT Shield.

Here’s the circuit schematic. We will use the GND pin, the digital pins from 8 to 13, as well as the pin number 14. As the 5V pins are already used by the TFT Screen I will use the pin number 13 as VCC, by setting it right away high in the setup section of code.

I will use the UTFT and URTouch libraries made by Henning Karlsen. Here I would like to say thanks to him for the incredible work he has done. The libraries enable really easy use of the TFT Screens, and they work with many different TFT screens sizes, shields and controllers. You can download these libraries from his website, RinkyDinkElectronics.com and also find a lot of demo examples and detailed documentation of how to use them.

After we include the libraries we need to create UTFT and URTouch objects. The parameters of these objects depends on the model of the TFT Screen and Shield and these details can be also found in the documentation of the libraries.

Next we need to define the fonts that are coming with the libraries and also define some variables needed for the program. In the setup section we need to initiate the screen and the touch, define the pin modes for the connected sensor, the led and the button, and initially call the drawHomeSreen() custom function, which will draw the home screen of the program.

So now I will explain how we can make the home screen of the program. With the setBackColor() function we need to set the background color of the text, black one in our case. Then we need to set the color to white, set the big font and using the print() function, we will print the string “Arduino TFT Tutorial” at the center of the screen and 10 pixels  down the Y – Axis of the screen. Next we will set the color to red and draw the red line below the text. After that we need to set the color back to white, and print the two other strings, “by HowToMechatronics.com” using the small font and “Select Example” using the big font.

Now we need to make the buttons functional so that when we press them they would send us to the appropriate example. In the setup section we set the character ‘0’ to the currentPage variable, which will indicate that we are at the home screen. So if that’s true, and if we press on the screen this if statement would become true and using these lines here we will get the X and Y coordinates where the screen has been pressed. If that’s the area that covers the first button we will call the drawDistanceSensor() custom function which will activate the distance sensor example. Also we will set the character ‘1’ to the variable currentPage which will indicate that we are at the first example. The drawFrame() custom function is used for highlighting the button when it’s pressed. The same procedure goes for the two other buttons.

So the drawDistanceSensor() custom function needs to be called only once when the button is pressed in order to draw all the graphics of this example in similar way as we described for the home screen. However, the getDistance() custom function needs to be called repeatedly in order to print the latest results of the distance measured by the sensor.

Ok next is the RGB LED Control example. If we press the second button, the drawLedControl() custom function will be called only once for drawing the graphic of that example and the setLedColor() custom function will be repeatedly called. In this function we use the touch screen to set the values of the 3 sliders from 0 to 255. With the if statements we confine the area of each slider and get the X value of the slider. So the values of the X coordinate of each slider are from 38 to 310 pixels and we need to map these values into values from 0 to 255 which will be used as a PWM signal for lighting up the LED. If you need more details how the RGB LED works you can check my particular tutorialfor that. The rest of the code in this custom function is for drawing the sliders. Back in the loop section we only have the back button which also turns off the LED when pressed.

For example, on a device that is stable at a single touch, it is also easy to check the phenomenon becomes unstable when it comes to three or more points.

1.5.1 Responding to pen pressure.I was wearing a subtle color for each touch ID. (Five or more are repeated the same color.) Modify additional bug at full screen.

Well, I would like to tell you that the touch screen not working or unresponsive touchscreen on Android is a common issue. And, this issue doesn’t only happen with Android, Apple users also experience the iPhone/iPad touchscreen not working issue.

So, if you have also come across the same issue and want to fix it then this blog is definitely for you. Here you will get to know about how to fix the touchscreen problem on Android?

To fix the Android touchscreen not working issue remove the SD card and SIM card, boot the phone in the safe mode, run antivirus scan, diagnose the phone display, and factory reset your phone. Well, these are not the only ways to deal with this issue. To find out the complete list of solutions, keep reading this guide.

If your Android device touch screen is not physically damaged or smashed and it had stopped working all of a sudden and does not respond to your touch, then this may be caused due to software issues.

If your phone’s touch screen is not working, then it is possible that this issue is appearing due to the system issue. In this situation, it is better to use the Android Repair Tool.

This tool will fix all of the system issues that might be causing this problem on your phone. Not just this, but it can also fix several other problems, such as the phone being stuck in the boot loop, apps crashing issues, black screen of death error, battery issues, and many more.

A soft resetting of the phone is a very basic move but in some cases, it works magically. If the phone touch screen not working is not happening due to any major issue, this trick may get your job done. Here’s how to fix unresponsive touch screen on Android:

Sometimes, the screen damage is not the actual reason for the unresponsiveness. There might be some issue with the memory card or SIM card. In this situation, you should try removing the SD or SIM card from your phone:

Mostly Android touch screen doesn’t work due to the screen protector. Even though a screen protector protects your phone’s screen from damage, dust, scratches, and water drops, it can also cause issues, such as the touchscreen not working.

If there is any scratch on the screen protector or is completely damaged, then thetouchscreen of your phone won’t respond. In this case, the best solution would be to remove the protector.

However, it will only work if the issue is happening due to the screen protector. If it is not working, then there must be some other issue with your phone screen. Hence, follow the other listed solutions.

It is a temporary solution to this issue, but you can use it until you find the actual reason or fix the issue permanently. You don’t only need to rely on the touch screen to control the phone. There are other options too to navigate through the phone.

You can try the 3-party apps to use the face or voice recognition feature to access your phone. However, this trick can only work if your phone touchscreen is at least partially working so that you can download the app.

To control the phone with the voice, you can use Google’s Voice Access app. This app will listen to your commands & assign a number for each action available on the phone screen. After this, you don’t need to tap on the screen.

Now, just call out the assigned number.Voice Access app also fixes the phrases for certain actions. For example, if you say go back, the app will take you back to the previous screen.

The EVA Facial Mouse app is a virtual cursor that can let you navigate through your phone using face recognition technology. To move the phone screen, simply move your phone in that direction.

If the above-given solutions failed for you, then you can try to boot your phone into Safe Mode to fix the problem. It will help you to recognize whether the touchscreen issue is caused due to any of the recently installed apps.

If your Android touchscreen works properly afterbooting the device into the Safe Mode, then it means the recent third-party app was a culprit behind this problem. Once you find out about the troublesome 3rd party app, simply uninstall it on your phone.

If your touch screen problem is not affecting your ability to download apps from the Play Store, then download and install an anti-malware application and scan your device. Maybe this can fix all your problems.

There are various apps available in the Play Store that can calibrate your device’s touch screen and improve its accuracy and responsiveness. These apps are very much effective particularly when your touch screen responds inaccurately or responds too slow.

Open Play Store, type “touch screen calibration” in the search bar and you will get a few results. Check the ratings and read the review carefully before you download them.

Wondering why my phone touchscreen is not working? If so, you should try 3rd party apps tofix display issues on your Android phone. There are so many apps on the Google Play Store that can diagnose the touchscreen problem of your phone.

These apps will help you to pinpoint what is wrong with your phone screen.For this, I recommend using the Display Tester. First, download and install the app on your device and then follow these instructions:

Here, you will get a bunch of options to test the issue from all aspects. With this tool, you can detectburn-in on OLED screens, dead pixels, the accuracy of saturation and contrast, multi-touch status, etc.

If the touch screen is totally unresponsive on an Android phone/tablet, then it is time to perform factory on the device. As doing this will erase all data on your Android device, you should only go with this option if nothing else is working out for you.

If your Android phone or tablet screen has been physically damaged due to several reasons such as a dropped the device in water, on the floor from a high distance, smashing the screen, or breaking the device then the touch screen could be damaged and thus stop responding.

The first thing we are going to do is use the star codes to check if the touchscreen of the Android phone or tablet is working or not. First, dial the start codes compatible with your Android device.

Simply dial the codes, to open the device’s diagnostic mode. Once you enter into diagnostic mode, you can test the touchscreen for bugs and dead zones.

In this case, you can try one trick. Simply, knock each corner of the touch screen 2-3 times and then see if the Android unresponsive touchscreen issue has been resolved or not. If it is still not working, then you can try the next fixes.

There are some instances where the Android touch screen stopped responding after the phone is dropped into the water or due to some reason water drops gets inside the screen.

Nevertheless, you can still fix this problem and get your phone screen back to its normal working condition. For this, you must check out the guide on how to how to fix unresponsive touch screen on Android damaged by water.

This is a straightforward solution, if there is a hardware issue with your phone, then you don’t have any other option but to buy a new touchscreen for your phone.

There are some cases, where the phone touchscreen can be accessed partially. In this situation, the 3rd party apps can help you out in resolving the problem and enhancing the screen latency. There are so many apps that can calibrate the phone screen to decrease the response time.

This tool will suggest you click on several sections of the touchscreen. After doing this, the app will reduce the latency according to the phone model.

Many people ask how to fix unresponsive touch screen Android but before that, is important to know what are the reasons for the touch screen not working on Android, right?

Physical damage– Maybe your Android phone is damaged or broken. Or maybe it’s due to moisture detected issues, high temperature, static electricity, cold, etc can lead to touch screen damage on Android phones.

The Android touch screen is not working/became unresponsive? Now, wondering how to recover data from an unresponsive touch screen of an Android phone?

You can use the user guide to find out how Android Data Recovery Toolworks in order to recover data from an Android device with an unresponsive touch screen.

Yes, the cracked screen affects the responsiveness of the touchscreen. When the phone screen gets cracked, the digitizer, an important component of the phone, starts interrupting the touch of the screen. But when the phone screen totally get damaged, the digitizer gets exposed to water, dust, moisturewhich leads to major damage.

If you see a phone’s screen then it has two major parts: the actual LCD and the glass. The glass of the screen can be replaced easily but when the LCD gets damaged the repairing of the device becomes a risky task.

There are ways to fix the cracked screen temporarily. You can use a screen protector or tape to fix it. First, clean the phone screen as much you can and put packaging tape over the screen. If there is some extra tape then remove it. And now you can use the phone as before but remember, it’s a temporary fix.

Though the most Android phone touchscreen issue can be solved by removing the screen protector and cleaning the screen with a soft, slightly damp, lint-free cloth. but if that doesn’t work, you can try the other ways shared in this blog to solve how to fix unresponsive touch screen Android phone issue.

On the other, you may also lose your important and valuable data from your device, hence it is recommended that you must try Android Data Recovery Softwareto recover data from an Android device whose touch screen is not working or became unresponsive.

I think I figured it out It may help try it. The ghost touches could be from a lose screen that has to be fix are software. But you would have to determine that by these steps. I figured the screen would either be messed up if you dropped it and the cable is lose are a defect and can cause ghost touches are screen scrolling are wacky things going on with your screen physically or could be static shock if you do not have a static free cover or your power adapter if it"s not original for the phone are a different kind can cause it as well all this I found out just doing everything I could think of that may cause this thing to act up. Unless you have a static free case or antishock case that may cause the problem as well. As I went a whole day without plugging in my charger after I done a few things that I will explain threw this whole thread that it did not act up one time with out plugging in my charger I used a charger for my samsung galaxy as it the same volts nothing different. There is a dead spot on the screen where no matter what you do it will not let you touch anything and it"s toward the top in a straight line across. Very seldom it will let you touch anything and I think it"s where the ghost touches are right in that spot.Now for software. No matter if you reset your phone from the hard reset if your signed up with google unless you go vanilla and not let google download everything you had on there again your in trouble if you do. For one it"s software problem that has not been fixed and for 2 when cutting on and off it stops sometimes that"s software. Now for the good part what others may find out is if you go in and reset your phone with just says reset to default instead of starting from scratch the phone doesn"t act up. This phone is very picky on what it wants on it. Also I found that it could be the facebook app causing it to do this!! I promise you once I reset my phone to default and deleted the facebook app I had no problems yet all day!! Because as I got notifications from facebook on my phone locked up and started the wacky and not responding and all other kinds of things with ghost touches and all. I looked at facebook from the web with google chrome after the app was off again and no problems. Also I found out that if you do not use the default text keyboard are the default text message program on the phone no matter if you like what it does are not it will cause you problems!! I will update and let you know as I go threw finding out what really happens with doing all this again!! Thanks and hope this helps a lot of people as it certainly had me stumped. I love this phone but couldn"t use it will get back as I find more problems if things start to acting stupid again. OO and I have the verizon VS980

You probably touch your phone"s screen hundreds of times per day. Combined with its delicate glass build, it"s no surprise that smartphone touchscreens are one of the most common components to run into issues.

But the touch screen not working on your Android phone isn"t always the result of a hardware failure. If your phone touchscreen often isn"t working or fails to respond, there"s a lot you can do before getting professional help.

First, you should rule out the possibility of a software bug if your phone touch screen is not working. There are a handful of troubleshooting steps you can do to confirm this.

A good-old reboot might sound futile to fix such an advanced issue. However, it"s often one of the most successful ways to fix an unresponsive touch screen on Android. Restarting your phone shuts down and refreshes all background services, which could have crashed and led to your issue.

If you"re unable to touch the screen to select the option, on most devices, you can hold down the Power button for several seconds to switch off your phone. In some cases, you may need to hold down the Power button and the Volume Up button at the same time.

If your touch screen is not working, but only intermittently, then you may be able to re-boot your phone into safe mode. Android"s safe mode lets you use your phone with only the original software it shipped with, which strips out all services and apps you"ve installed. If your display works normally in safe mode, a third-party app is likely at fault here.

To enter safe mode on most new Android devices, press and hold the power button. In the resulting prompt, touch and hold the Power off button. Once you see the prompt to enter safe mode, tap OK, and your phone will soon restart. To exit safe mode, just restart your phone normally.

If you"re scratching your head wondering, "Why is my phone touchscreen not working?", you"ll find a range of apps on the Play Store that could help you to diagnose your display issues. These are designed to pinpoint what exactly is wrong with your phone"s touchscreen. We recommend trying out one simply called Display Tester.

When you launch Display Tester, head into its Tests tab. Here, you have the option to test a whole bunch of aspects. The app can detect dead pixels, burn-in on OLED screens, whether the contrast and saturation are accurate, multi-touch status, and more.

If you got positive results in touch-based tests, you should review all recently installed apps or consider performing a factory reset. Since your touchscreen functioned as intended under special circumstances, a third-party app is most likely the root cause.

Many people apply a screen protector on their phones as an added safety against drops and scratches. But that same sheet of plastic or glass could prevent your touch signals from reaching the display panel.

If your phone"s screen has been acting up lately, try removing the protector. Of course, this doesn"t guarantee a fix. However, it could increase the response rate on an already weak screen.

Touchscreen Repair is a lightweight app that calibrates your screen to reduce response times. The app asks you to consecutively tap several sections of the touchscreen. Based on your phone"s internals, it then artificially drops the latency as much as possible.

The effectiveness of Touchscreen Repair varies depending on your phone maker. Many OEMs ship their phones with optimal response rates. In those scenarios, Touchscreen Repair won"t be able to do much. But it"s worth a try if nothing else has worked yet.

You don"t have to rely on touch inputs to control your phone. To better serve users with accessibility needs, voice and facial-based interaction methods for Android have come a long way.

With the right apps, you can navigate on your phone entirely through your voice and facial movements. Of course, these solutions only apply if your phone"s touchscreen works enough to install an app from the Play Store.

Else, you can try installing the app to your phone through the Play Store web interface. And you can disable touchscreen input on your phone until you get the screen fixed.

Google"s Voice Access app proactively listens for your commands and assigns a number to every action available on the screen. Instead of touching an app icon or menu element, you just have to call out the assigned digit.

Voice Access links fundamental actions to fixed phrases. So you can say "screen down" for moving around pages and "go back" to return to the previous screen, for example.

This app does exactly what its name suggests. It adds a virtual cursor on your screen, which you can manipulate with your face. To move the pointer, you simply have to move your head in the appropriate direction.

If you can"t install any apps due to screen problems, connecting an external keyboard and mouse might do the trick. This assumes you can still see the screen, though.

With these possible fixes, you should hopefully be able to revive your phone"s touchscreen if it"s just a software bug. Failing that, the apps mentioned can grant you a temporary workaround.

Otherwise, you will have to visit a service center for help. If you"re lucky, a professional will be able to restore the touchscreen"s functions, although depending on the device, it may be a pricey repair. If not, you"ll have to look at replacing your phone.

Your Android touch screen might not be working for various reasons. Hopefully, one of the fixes above helped solve your touch screen issues. If everything fails, perhaps it"s time to upgrade.

We"ve all been there. Tapping, swiping or zoom-pinching, there"s often a moment when the touchscreen display on your tablet refuses to respond. How do you overcome this, and achieve tablet-tapping Zen?

As the primary mode of interaction between you and your apps, the tablet touchscreen is vitally important. Any damage inflicted – knocks to the device, scratches or worse – will degrade the touchscreen. Short of paying for a replacement, you will need to make sure the display is kept safe and intact.

The following tips – also suitable for smartphones – will help you resolve your tablet"s touchscreen responsiveness issues. We"ve designed this guide for all touchscreen tablet computers. So, if your Android tablet touchscreen is not working, or your device uses iOS, or Windows, the answers you need are right here.

Perhaps the best place to start in troubleshooting screen responsiveness issues is to make more system RAM available. This may take a moment but should give you an idea of how bad the problem is.

If your Microsoft Surface touchscreen is not working, or you use a different Windows 10 tablet, close as many desktop apps as is practical can before switching to the Start screen. Then:

Restarting a tablet isn"t a case of just tapping the power button to turn the screen off. Instead, the whole device must be switched off and back on again.

After all, how do you fix an unresponsive touchscreen when most of your options are accessible through the screen? The answer is surprisingly simple: connect a mouse.

Knowing which area(s) of the touchscreen are failing to respond correctly can be useful in diagnosing what is wrong. This information would prove useful to any engineer who ends up repairing the tablet.

On Android, free calibration and testing apps are available. Touch Screen Test is a good app that helps you find specific areas where input is not detected.

For devices that are in warranty, this means contacting the manufacturer and arranging a return, or dropping into a store. iPads, for example, can be taken to Apple Stores; Samsung tablets can similarly be taken to Samsung stores. In some cases, doorstep repairs are possible, where the device is repaired in a mobile Samsung-approved workshop parked outside your home. If your Samsung tablet touchscreen is not working, this fast-repair option might be available.

Whether you"re using a Samsung, LG, iPad, or your Lenovo tablet touch screen is not working, check your device manufacturer"s support pages to find the correct steps to arrange repair. Make it clear what steps you have attempted to resolve the touchscreen issues.

As noted above, if your tablet screen is cracked, it can impact touch reliability. Whether big or small, a cracked tablet screen will always fail eventually. Having your tablet looked at by an engineer under warranty is the smart option but isn"t always possible. If your tablet is out of warranty and the screen is cracked, you have two options:

Wondering how to repair a tablet touch screen yourself? For cheaper tablet models repair makes more sense than with premium brands. So, if you have a Vankyo, Onn, Yosatoo, Contixo, or Amazon Fire tablet with a screen that is not working or responding to touch, consider replacing the display yourself. Our guide to replacing a cracked Amazon Fire tablet display will help here.

Most problems can be avoided with care, a screen protector, and a case for your tablet. But where possible, avoid water and don"t get your tablet wet.

However, if the digitizer or LCD is also damaged during a fall, that screen no longer carries value because it cannot be refurbished. Repair shops cannot sell broken LCDs to refurbishing companies; therefore, they cannot offset the cost of an LCD repair. That is why repair stores often charge a little extra if there is damage to the LCD or digitizer, to make up for that loss. Repair stores that don’t have an additional charge for an LCD repair typically inflate their glass repair price to make up for the loss from damaged LCDs. If they have one price, that means everyone is paying more to cover the cost of customers who have damaged LCDs and customers who only have cracked glass. This is why TCR separates the price of glass and LCD repairs for you! If you only have cracked glass, you only have to worry about paying to replace the cracked glass.

If your phone or tablet’s glass is shattered there will be cracks or chips on the screen itself. If it is just the glass that is damaged, the device may still function and you may be able to use it normally. If this is the case, it is likely that only the glass needs to be replaced. To prevent further damage to your device it is best to get it repaired quickly. For example, if liquids seep through the cracks it could cause permanent damage to the LCD.

Many people may continue to use their touchscreen with shattered glass and delay fixing the glass on their devices; however, if the touchscreen isn’t responsive, it could be a sign of more significant damage to the device’s digitizer which is integrated with the LCD screen.

A pixelated screen can indicate LCD damage. This would look like a patch of multicolored dots, a line or lines of discoloration, or a screen with rainbow colors. For many people, these colors are an easy way to know that their LCD is broken and that they should get it repaired.

Dropping your phone isn’t the only reason you’ll end up with a pixelated screen. Over time, your screen’s LCD may break down through regular use. This happens to other devices aside from your smartphone or tablet. Pixelation can happen to TVs and computers, too. People typically decide to buy a new device when this happens. Fortunately, with an LCD repair, you can fix the device without needing to replace it.

A black screen or black spots on your smartphone or tablet is an indication of a damaged LCD. Often with a bad LCD, a phone may still turn on and make noises, but there is no clear picture. This does not necessarily mean any other part of the phone is damaged and a simple screen replacement will get it functioning again. Sometimes it can mean a battery or other internal component is damaged. It is best to have a highly qualified phone repair technician diagnose what is wrong so the appropriate repair can be made.

Fortunately, your mobile device is fixable whether you cracked the glass or damaged the LCD. Stop by or call TCR: Triangle Cellular Repair at (919) 263-2699 for a free diagnostic and quick, affordable cell phone repair in Chapel Hill and surrounding areas. We’re always happy to help!

However, if the digitizer or LCD is also damaged during a fall, that screen no longer carries value because it cannot be refurbished. Repair shops cannot sell broken LCDs to refurbishing companies; therefore, they cannot offset the cost of an LCD repair. That is why repair stores often charge a little extra if there is damage to the LCD or digitizer, to make up for that loss. Repair stores that don’t have an additional charge for an LCD repair typically inflate their glass repair price to make up for the loss from damaged LCDs. If they have one price, that means everyone is paying more to cover the cost of customers who have damaged LCDs and customers who only have cracked glass. This is why TCR separates the price of glass and LCD repairs for you! If you only have cracked glass, you only have to worry about paying to replace the cracked glass.

If your phone or tablet’s glass is shattered there will be cracks or chips on the screen itself. If it is just the glass that is damaged, the device may still function and you may be able to use it normally. If this is the case, it is likely that only the glass needs to be replaced. To prevent further damage to your device it is best to get it repaired quickly. For example, if liquids seep through the cracks it could cause permanent damage to the LCD.

Many people may continue to use their touchscreen with shattered glass and delay fixing the glass on their devices; however, if the touchscreen isn’t responsive, it could be a sign of more significant damage to the device’s digitizer which is integrated with the LCD screen.

A pixelated screen can indicate LCD damage. This would look like a patch of multicolored dots, a line or lines of discoloration, or a screen with rainbow colors. For many people, these colors are an easy way to know that their LCD is broken and that they should get it repaired.

Dropping your phone isn’t the only reason you’ll end up with a pixelated screen. Over time, your screen’s LCD may break down through regular use. This happens to other devices aside from your smartphone or tablet. Pixelation can happen to TVs and computers, too. People typically decide to buy a new device when this happens. Fortunately, with an LCD repair, you can fix the device without needing to replace it.

A black screen or black spots on your smartphone or tablet is an indication of a damaged LCD. Often with a bad LCD, a phone may still turn on and make noises, but there is no clear picture. This does not necessarily mean any other part of the phone is damaged and a simple screen replacement will get it functioning again. Sometimes it can mean a battery or other internal component is damaged. It is best to have a highly qualified phone repair technician diagnose what is wrong so the appropriate repair can be made.

Fortunately, your mobile device is fixable whether you cracked the glass or damaged the LCD. Stop by or call TCR: Triangle Cellular Repair at (919) 263-2699 for a free diagnostic and quick, affordable cell phone repair in Chapel Hill and surrounding areas. We’re always happy to help!

• Perform highly diversified duties to install and maintain electrical apparatus on production machines and any other facility equipment (Screen Print, Punch Press, Steel Rule Die, Automated Machines, Turret, Laser Cutting Machines, etc.).

Though it"s impossible to gauge how widespread the problem is, a number of users are reporting an issue where certain spots on the iPhone"s MultiTouch screen -- particularly a strip about 1/2 inch in height somewhere below the top of the screen -- will not accept input. If indeed you have a defective screen, Apple is apparently willing to replace it with little hassle. However, to ensure that a more innocuous issue isn"t at play, try the following first:

Reset your iPhone Sometimes, ostensibly dead spots on the screen are merely the result of frozen applications or an unresponsive interface rather than actual hardware failure. Press and hold the Sleep/Wake button (on the top of the unit) and the Home button simultaneously for several seconds until the Apple logo appears and check for persistence of the issue.

Clean the screen It may sound trite, but a glaze of any foreign substance can cause operational difficulties for the iPhone"s screen. Clean the screen with the cleaning cloth that came in the box with the iPhone.

Restore your iPhone As a last resort, try restoring. This can remove lingering software issues that might be causing a lack of screen response. To perform a restore, Connect your iPhone to your Mac or PC and, in iTunes, click the Restore button under the Summary tab. Restoring the phone will erase contacts, calendars, photos and other data on the phone, but will restore automatically backed-up information including text messages, notes, call history, contact favorites, sound settings, widget settings, etc.

Also, if you are indeed experiencing a hardware failure, please drop us a line indicating what version of screen your iPhone uses. To discover this information, put your iPhone in field test mode by accessing the Phone application, tapping Keypad, then entering *3001#12345#* and pressing Call. Tap Versions, then inspect the entry next to LCD Panel ID. Let us know whether your iPhone is a 7 series or 5 series

I"ve been looking around for a small HDMI LCD screen to use as a seconday screen with Windows and it took a few months of research on and off before deciding on the Elecrow 5" HDMI monitor. For the most part, it took me a while because a lot of reviews here and on other sites were primarily about use and config with Raspberry Pi.

Thanks to reviewer Alan who gave a good review with plenty of photos that convinced me to go for it. Not sure if it"s just how Amazon stores user review videos but the video review was a bit pixelated so it was hard to appreciate the clarity of the screen but it seemed to be what I was looking for.

Having used it for a few months now I still can"t believe how clear and sharp the screen is! There are sadly no controls for brightness, colour, saturation or contrast but everything displayed looks very nice and accurate.

As I"m using this with Windows, I"ve not needed to look through the included driver utility disc and not tried the resistive touchscreen so I can"t comment on those. Windows just detects it as a second display and lets me extend my desktop. No drivers needed. The box contains the LCD screen, a HDMI bridge connector that neatly connects the HDMI socket on the top of the screen to the HDMI socket on the Raspberry Pi when mounted together. Standoffs for mounting are also supplied plus a plastic stylus.

+ It shows the video feed straightaway without any fancy splash screens or slow initialisation pauses. This was one of the annoyances with Lilliput monitor was a slow bright blue screen on power on before it would think about showing the feed. I know it"s only a few seconds but I specifically wanted instant feed on power on for future uses.

+ I was hoping for an on/off switch but no it only has a backlight switch which I wasn"t sure about to begin with but I"ve since found it very useful and better. I was thinking about buying a micro USB cable designed for Raspberry Pi with an inline power switch built in but for now the brightness switch is fine. As a blessing in disguise, it prevents Windows/DirectShow from blinking all screens when it realises a monitor has been disconnected, that blink would often cause the video on my TV app to freeze. Turning off backlight doesn"t cause DirectShow to have a fit.

- The only negative I can think of is the availability or lack of screen cases with cutouts to suit the position of the HDMI and USB sockets on this. The Elecrow has its HDMI and USB socket at the top edge of screen and nearly all cases I have looked at are designed for screens with HDMI and USB on the right edge. I"ve had to import one from China that had the cutouts for this screen. Took about 2 weeks to arrive. Wish I"d have ordered two cases at the same time to avoid the wait as I"m impressed with the clarity of Elecrow I hope to buy another one in near future.

! Just one more thing Columbo! I had originally wanted to buy Revision B of this screen with capacitive touch screen because it has OSD menu buttons. I can"t find any manuals but I"m hoping that OSD buttons allows settings for brightness as that was my other preferred criteria. Having said that, I think it would be even more impossible to find suitable case due to the positions of sockets and extra menu buttons on Revision B screen. Maybe Elecrow could provide some insight on available cases?

Many Apple products use liquid crystal displays (LCD). LCD technology uses rows and columns of addressable points (pixels) that render text and images on the screen. Each pixel has three separate subpixels—red, green and blue—that allow an image to render in full color. Each subpixel has a corresponding transistor responsible for turning that subpixel on and off.

Depending on the display size, there can be thousands or millions of subpixels on the LCD panel. For example, the LCD panel used in the iMac (Retina 5K, 27-inch, 2019) has a display resolution of 5120 x 2880, which means there are over 14.7 million pixels. Each pixel is made up of a red, a green, and a blue subpixel, resulting in over 44 million individual picture elements on the 27-inch display. Occasionally, a transistor may not work perfectly, which results in the affected subpixel remaining off (dark) or on (bright). With the millions of subpixels on a display, it is possible to have a low number of such transistors on an LCD. In some cases a small piece of dust or other foreign material may appear to be a pixel anomaly. Apple strives to use the highest quality LCD panels in its products, however pixel anomalies can occur in a small percentage of panels.

In many cases pixel anomalies are caused by a piece of foreign material that is trapped somewhere in the display or on the front surface of the glass panel. Foreign material is typically irregular in shape and is usually most noticeable when viewed against a white background. Foreign material that is on the front surface of the glass panel can be easily removed using a lint free cloth. Foreign material that is trapped within the screen must be removed by an Apple Authorized Service Provider or Apple Retail Store.

Dead zones on phone and tablet screens are one of the rarest and irritating issues you can come across on your device. If you’re unable to use your device as usual because of its unresponsive touch screens, there are a handful of fixes you can try at home to resolve the problem. This article sheds light on various solutions on how to fix dead zones on phone & tablet screens.

Whether it’s the middle of the touch screen not working, the right side of the touch screen not working, or anywhere not working on the screen, this article will help you fix it. You might not need to visit a repair center too.

Before looking for how to fix dead zones on a phone screen, there are a few things to note. What causes unresponsive touch screens most times is because the screen is cracked. Broken screens may cause some parts of your display to malfunction, especially when exposed to moisture, water drops, and others. If that’s the case, we recommend you go for a screen replacement instead.

More so, if you have a screen protector on your phone, simply take it off. Sometimes, probably because of poor fixing, your screen protector may cause dead pixels on a phone. If you"re wearing a glove or anything is covering your fingers, kindly remove them.

As simple as it is, restarting your phone can fix the dead zones on screens, as well as other issues. And that’s a quick way to diagnose if it’s a hardware problem or some software glitches hanging around the corner.

The next thing to do when experiencing ghost touch or unresponsive touch on your device is to test the part of the screen that is affected. This is surely a way to get to the root of the problem.

While some people experience the middle of the touch screen not working, some might be the right side of the touch screen not working. In that case, you need to check what part of your screen is not functioning.

To do that, we’ve chosen a simple app called Touchscreen Test.You can install it from the Play Store or get its equivalent for your iPhone on the App Store, then follow the steps below.

Ghost touch, dead pixels, and unresponsive touch screens are not always hardware problems on mobile devices. Sometimes, it may be because of an app you installed earlier - a poorly coded or malware-ridden app.

To ensure that what caused unresponsive touch screen on your device is not an app, you need to boot into Safe Mode. In this mode, your phone only loads the system apps. Other apps are paused/disabled until you exit Safe Mode.

Similarly, if you’ve turned on Developer Settings on your phone, you may need to turn it off to fix the dead pixels on the screen – at least on a software level.

Another method of fixing an unresponsive touch screen on your phone is to power it off and remove all the peripherals connected to it – your SIM cards, micro SD card, earphones, and others.

Though rare, your SIM and SD card may go haywire and tamper with some functions on your phone. And most times, the issues seem to disappear after pulling out the SIM card and SD card. So you can try it to fix dead pixels on your screen.

If you experience ghost touch (the screen pressing itself), or an unresponsive touch screen only while charging your phone, the culprit might be that charger you’re using.

The first thing to do in that case is to remove the charger. If the screen behaves normally after removing it, then you might need to get a new charger, or better still, change the cable. Also, if the charger amperage is more powerful than what your phone can occupy, it can affect the screen.

If none of the methods above could fix the dead pixels on your phone screen, you might want to try a more technical solution at home. This method requires you to use an igniter – usually found inside an electronic lighter at home – to create static electricity and fix the dead pixels on your screen.

Warning:though this method has a high chance of fixing dead spots on touch screens, it will void your warranty, and it can damage your display irreversibly. Also, it’s just a temporary fix most times - dead zones may reappear after a few hours, days, or months. So, try at your own risk. Meanwhile, you"re better off visiting a repair center.

As we said earlier, this method will void your warranty and may incurably damage your screen. So, try it at your own risk. And if it worked for you, you may need to keep the igniter at reach in case your dead spots reappear. This method will also fix ghost touch on your screen if you have it.

The last resort if none of the above fixes work, or if you don"t want to lose your warranty to an igniter, is to look for how to repair the touch screen of a mobile phone.

You need to visit a repair center to fix the dead zones on your screen. We recommend you visit the official repair center if your brand has one. They will help you diagnose and fix the problem in a short time. Also, if you need to replace your screen, they will help you out.

Meanwhile, if you’re TECNO, Infinix, or itel device is still under warranty and you don’t have a broken screen, we’ll fix the dead zones on your screen for free!