lcd screen test android factory

Do you know you can use hidden secret codes to run the hardware test in an Android smartphone? These sets of codes are used to diagnose and test both hardware and software of your android smartphones. So, what actually is the secret codes? How do they look like? Who can use such secret codes? And How to use such codes to run the test on your android devices? Let’s Discuss.

Secret Code is the sets of special commands or the instruction that is executed to perform a specific task within your android devices. These codes are used during the hardware and software test on Android. Secret Codes also helps us to enable and disable lots of hidden setting. With the help of such code, you can easily check the phone’s hardware and software. Similarly, you can get information about the phone, details of the apps you have been using, battery information and much more. The main purpose of using such code is to check if the devices are functioning well or not.

Secret Codes are the hidden features in Android devices so everyone is not familiar with such codes. Such codes are especially used by the experienced user. One can use such codes if they are strong technically. Misuse of such information can lead to loss of data or hardware damage. Hence, it is recommended to use if you are technically good.

You don’t need any application to run the hardware test in the Android smartphone. Just pull up the call dialer and press the correct instruction. The phone will automatically show the information as soon as the user finishes typing the secret code.

Here is the screenshot from the hardware test of Android smartphones. The code used for testing hardware is *#*#4636#*#*. The screenshots below show information about the battery, usage of the phone’s application and information about the phone.

The Android operating system is well known for its hidden features and Easter eggs, like using custom dialer codes to access various hidden apps and settings. Some of these codes are universal, which means you"ll get the desired output on any Android device, whether they"re a great flagship or a cheap budget phone. However, custom OEM skins (like One UI by Samsung and MIUI by Xiaomi) and carrier-customized models often come with their own set of hidden codes.

Below you can find a bunch of generic and device-specific Android hidden codes. Give them a try and discover some of the handiest secret functionalities of your phone. If you don’t see your device listed or you want to submit a new code, send a message to Skanda Hazarika (SkandaH on the forums) with all the relevant details.

We hope this guide will get you in and out of hidden menus within Android. We’ll be updating this guide with more such codes for specific phones, so check back again in the future.

Besides obvious features like a touchscreen and biometric sensors, the modern smartphone comes with an array of state-of-the-art hardware in the form of various sensors that help your device sense the environment around it. And if you have a Samsung handset, chances are, you have a handy feature built in that enables you to check if these sensors are functioning 100 percent.

Unbeknownst to a lot of Samsung fans, most Galaxy phones have a secret diagnostic mode built in which can be accessed simply by inputting a little-known code. Best of all, this feature is extremely easy to access and is a handy way of testing out a new or used phone to ensure it"s in perfect running order before you commit to buying it.

Below are the following tests you can perform on your Samsung handset once you"ve input the code and entered HwModuleTest mode. Please note that some may be missing screenshots due to security reasons or the nature of the tests.

To check if your phone"s receiver is working properly, tap on the "Receiver" button to commence testing. Doing so should take you to a white screen, accompanied by a clearly audible dial tone. Once you"re satisfied, simply tap on the back button twice to go back to the main test page.

"Vibration" tests out your phone"s vibration motor. Your screen will go black once you tap on the "Vibration" button, accompanied by a constant vibration. Tap on the screen once to exit this test and go back to the main test screen.

Tapping on the "Sensor" button will yield a test page for a host of sensors — namely the accelerometer, proximity sensor, barometer, light sensor, gyroscope, magnetic sensor, HRM, and fingerprint scanner. I"ll go over all eight of these submenus in separate sections below.

Tapping on the "Sleep" button will test out your device"s sleep functionality. Doing so should immediately put your phone into sleep mode. Once done, wake your phone as you normally would, and you"ll automatically be taken back to the main diagnostic page.

Tap on the "Speaker" button if you want to test out your handset"s audio output, which in turn plays a sample song that you can listen to. Once you"ve verified that your speakers are good, simply tap on the "Speaker" button again to end the test.

The LED test checks for the functionality of your device"s LED notification light. Running the test is straightforward — simply tap on the "LED" button, then tap on the screen to change the LED"s color from red, to green, and finally to blue. Tap on the screen one last time to end the test and go back to the main diagnostics page.

"Low Frequency" tests out your phone"s earpiece, and tapping on the button to commence testing will bring you to the "Low Frequency Test" page. From there, tap on 100 Hz, 200 Hz, and 300 Hz and place your ear against the phone"s earpiece each time you select a frequency to check for low buzzing noise. Once you"ve completed the tests, you can exit back to the main diagnostics page by tapping on the back button twice.

The Hall IC sensor detects magnetic fields and is primarily used to detect magnetic flip covers to automatically put the phone to sleep when a magnet within the flip cover touches the phone. The test itself doesn"t do much and simply gives a confirmation that the Hall IC functions properly.

Last but not least, the "Iris Camera Test" tests out the infrared iris camera that"s used to unlock your device. Tapping on the button pulls up your iris camera for you to align your eyes with, and will instantly close and go back to the main diagnostic page once it"s successfully scanned your iris.

Once you"re done performing your diagnostic tests, you can now exit HwModuleTest Mode. To do so, simply tap on the back button twice to go back to your phone"s dialer, then exit from there as you normally would. You"re now free to go on with the rest of your day, knowing that all is right with your beloved device!

Slowly drag your finger to the bottom right corner without lifting. Try to move your finger slowly enough that you can count to 10 before reaching the opposite corner of the 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.

We already have a separate article for iPhone users to resolve this problem. For now, let’s discuss this issue on Android. Mostly, when users come across this situation, they get frustrated immediately as they aren’t able to access any apps or other things on the phone.

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:

Though all Android device does not come with a removable battery feature. But, if your device provides a feature of a removable battery, then you must pull back your mobile back cover and remove the battery. Wait for 1 or 2 minutes and then re-insert the battery and Switch ON your phone.

If your Android device does not allow a battery removable feature, then there are some devices that offer an internal function for battery pull simulation. You can check online for tips on how to do this for your device model.

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.

Before factory resetting the phone make sure to backup and restore Android data. Here, we are not doing a normal factory reset, you need to do it in the recovery mode.

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?

Don’t worry here is a solution for you!! Try the Android Data Recovery Tool. This is the best way to recover the data from an Android phone no matter if it is working or not.

This tool can also recover data from a broken Android phone. Using this tool you can recover different kinds of data, such as photos, videos, contacts, text messages, WhatsApp messages, documents, call logs, audio files, and much more.

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.

James Leak is a technology expert and lives in New York. Previously, he was working on Symbian OS and was trying to solve many issues related to it. From childhood, he was very much interested in technology field and loves to write blogs related to Android and other OS. So he maintained that and currently, James is working for androiddata-recovery.com where he contribute several articles about errors/issues or data loss situation related to Android. He keeps daily updates on news or rumors or what is happening in this new technology world. Apart from blogging, he loves to travel, play games and reading books.

DisplayTester makes it possible to test almost every aspect of your device"s LCD/OLED screen. Using Google Cast it is possible to test the display quality of your TV. It is designed to allow full screen testing also on devices with soft keys (hiding the soft keys in ICS and later, immersive mode in KitKat and later).

When the soft keys are hidden it is not easy to advance to the next screen: First tap to make the buttons appear, then a quick swipe for the next screen before the buttons are hidden again.

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.

Controlling an Android phone with an external keyboard and mouse is mostly straightforward. All you need to do is find the right cable and plug the accessories in. Since your phone has one USB input, you will need a dongle to pair both of them.

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.

Think before you use this code. This secret code is to unlock Android phone passwords but it will factory format your phone. It will remove all files and settings including the internal memory storage. It will also reinstall the phone firmware. NOTE: Once you use this code, there is no way to cancel the operation unless you remove the battery from the phone. Therefore, think twice before using this code.

This code Code: *#*#4636#*#*can be used o get some interesting information about your phone. It shows the following 4 menus on screen: Phone information

This is a favorite. This code can be used to change the “End Call/Power” button action on your phone. By default, if you long-press the button, it shows a screen asking you to select any option from Silent mode, Airplane mode, and Power off.

Many people think there is universal master unlock codes for any Android phone. But this is not true. The best way to unlock your android phone passwords you need to do a factory reset. On any Android phone, this process usually looks similar. To do a factory reset on an Android phone you need to do: Your phone must be OFF. If you can’t turn off your phone (because you need to enter a password or pin) just take off the battery if you can’t do it so just wait until the battery drain to 0%. Only after it:

On some Android phones you will need to press 3buttons: Power + Vol Up or Down + Ok button (usually this button is on the center at the bottom of the phone. On most phones this btn is a sensor)

These steps will reset your Android phone to the factory setting and all your password and personal info will reset. So I recommendable to make back up or using the synchronization function to restore all your info after resetting.

Slowly drag your finger to the bottom right corner without lifting. Try to move your finger slowly enough that you can count to 10 before reaching the opposite corner of the screen.

Under your Pixel 5 phone’s screen, at the top center, you can see a white dot. This white dot is your proximity sensor. When your proximity sensor is on, the dot shows through the display. The dot can blink or stay solid.

Your proximity sensor keeps your phone’s screen off while you hold your phone near your face during a call, when your screen is locked, and when used by certain apps. Keeping the screen off helps save battery and avoid accidental taps on the screen.

All Pixel phones have proximity sensors. Because the Pixel 5’s display goes almost to the edge, you can see the Pixel 5’s sensor under the screen. Check our Pixel 5 phone diagram.

All use of this development version SDK will be governed by the Android Software Development Kit License Agreement (available at https://developer.android.com/studio/terms and such URL may be updated or changed by Google from time to time), which will terminate when Google issues a final release version.

Your testing and feedback are important part of the development process and by using the SDK, you acknowledge that (i) implementation of some features are still under development, (ii) you should not rely on the SDK having the full functionality of a stable release; (iii) you agree not to publicly distribute or ship any application using this SDK as this SDK will no longer be supported after the official Android SDK is released; and (iv) you agree that Google may deliver elements of the SDK to your devices via auto-update (OTA or otherwise, in each case as determined by Google).

WITHOUT LIMITING SECTION 10 OF THE ANDROID SOFTWARE DEVELOPMENT KIT LICENSE AGREEMENT, YOU UNDERSTAND THAT A DEVELOPMENT VERSION OF A SDK IS NOT A STABLE RELEASE AND MAY CONTAIN ERRORS, DEFECTS AND SECURITY VULNERABILITIES THAT CAN RESULT IN SIGNIFICANT DAMAGE, INCLUDING THE COMPLETE, IRRECOVERABLE LOSS OF USE OF YOUR COMPUTER SYSTEM OR OTHER DEVICE.

All use of this development version SDK will be governed by the Android Software Development Kit License Agreement (available at https://developer.android.com/studio/terms and such URL may be updated or changed by Google from time to time), which will terminate when Google issues a final release version.

Your testing and feedback are important part of the development process and by using the SDK, you acknowledge that (i) implementation of some features are still under development, (ii) you should not rely on the SDK having the full functionality of a stable release; (iii) you agree not to publicly distribute or ship any application using this SDK as this SDK will no longer be supported after the official Android SDK is released; and (iv) you agree that Google may deliver elements of the SDK to your devices via auto-update (OTA or otherwise, in each case as determined by Google).

WITHOUT LIMITING SECTION 10 OF THE ANDROID SOFTWARE DEVELOPMENT KIT LICENSE AGREEMENT, YOU UNDERSTAND THAT A DEVELOPMENT VERSION OF A SDK IS NOT A STABLE RELEASE AND MAY CONTAIN ERRORS, DEFECTS AND SECURITY VULNERABILITIES THAT CAN RESULT IN SIGNIFICANT DAMAGE, INCLUDING THE COMPLETE, IRRECOVERABLE LOSS OF USE OF YOUR COMPUTER SYSTEM OR OTHER DEVICE.

These codes can be broadly classified into two main categories USSD codes and MMI codes. While mostly not very useful to the average smartphone owner, these hidden codes can be used once in a while just to satiate your curiosity. The purpose of this article, therefore, is to create a comprehensive list of these secret codes for Android devices.

While the average user might not even need to know the difference between these two, it is always good to know what the differences are. Both USSD and MMI codes usually begin with an asterisk or a pound symbol/hashtag. These codes are updated regularly as new versions of Android software are released, and some manufacturers have their own additional special codes.

For example, several smartphones let users type in an MMI code and let them access a "test’ menu. This menu lets users quickly perform various tests on their smartphone ranging from the camera and vibration motor tests to speaker and display tests.

Note that there are only a few MMI codes that typically work on all Android smartphones. We have listed the most popular ones in the generic list of codes below.

These codes are mostly universal and should work on all Android devices, no matter the manufacturer. There might still be carrier restrictions on certain codes, though, so they"re not all guaranteed to work.

‡ Secure deposit required for advance exchange. Subject to device availability and terms. You will receive a certified refurbished, like-new device that has passed stringent software and hardware tests.