lcd screen test online factory

Check the extent to which your monitor can display similar colors while keeping them differentiable. You can create two color patches to do so. The more similar the two colors that can still be differentiated from one another are, the better your monitor can differentiate between the colors. This test is also well suited for making a direct visual comparison between two different monitors.

This test allows you to determine whether your monitor can reproduce text sharply and without any shadows, independently of other influences, such as text smoothing.

Test the monitor’s viewing angle stability. When you increase the viewing angle, the size and shape of the circles displayed should remain almost the same. Slight changes may appear. Less is better.

Use the slide bar to change the logo’s grayscale until the logo blends into the background to the greatest possible extent. The value shown corresponds to your monitor’s gamma value.

This test primarily serves to compare the response times of two monitors. Start by selecting a speed that creates clear streaks on the rectangles. However, you should still be able to clearly follow the rectangles visually. Then vary the distance between the rectangles until the lower edge (streak) of the one on the right no longer overlaps the lower edge of the one on the left. The smaller the distance, the shorter the response time. When comparing several monitors, select the same speed.

To clean the anti-static screen, we recommend using a special screen-cleaning tissue or solution that is suitable for the anti-static coating on LCD panels.

While moving the monitor, follow the instructions as described in the User Manual on how to hold the monitor. Do not put pressure directly on the LCD screen as it may cause irreparable cracks.

To run a diagnostic test on the LCD panel of a Dell laptop, see the Dell knowledge base article How to Run the LCD Built-in Self-Test on a Dell Laptop.

If the screen abnormality is not present in the integrated self-test mode, see the Dell knowledge base article How to Troubleshoot Display or Video Issues on a Dell Monitor.

Running a self-test feature check (STFC) or the built-in self-test (BIST) diagnostic on a Dell monitor is always a good practice to isolate LCD or monitor issues.

If the self-test feature check (STFC) or built-in self-test (BIST) diagnostic test passed, this indicates that the Dell monitor is functioning normally. To troubleshoot the display or video issue, see the Dell knowledge base article How to Troubleshoot Display or Video Issues on a Dell Monitor.

Imatest Blemish Detect uses filtering comparable to the human eye to flag visible defects while passing defects that are too small or weak to be visible. This requires careful tuning, which is explained on https://www.imatest.com/docs/blemish. Blemish detect also performs all the functions of Uniformity, which are explained in https://www.imatest.com/docs/lightfall and https://www.imatest.com/docs/lightfall_master.

For a gray screen image surrounded by a dark field (recommended; shown above), enable automatic cropping by clicking Options I and setting Blemish in the ROI (Region of Interest) section to Automatically select crop for image surrounded by a dark boundary. The largest rectangle that can fit in the screen area will be selected. (This feature is available in Imatest 3.10+.)

the L, R, T, and B boxes, near the bottom to the right of Auto crop (dark borders) can be set to the number of extra pixels to crop inside the automatically detected image boundaries. This can be helpful if the screen is shaded near its edges.

In addition, there are CSV, JSON, and XML output files. And very importantly, Pass/Fail criteria can be entered for testing. For example, you might set them to fail if there are more than 5 defects with more than 20 pixels (two sets of defect sizes and counts are available now).

Display and touch screen testing is often performed manually, which results in inconsistent quality and elongated testing time. Testing displays and touch screens with an automated system offers valuable benefits.

A quality check on capacitive touch screens includes zoom in, zoom out, and making sure touch screen keys work properly. SMAC’s Soft-Land procedure, programmable force, high speed and detailed feedback are essential in the testing, as SMAC actuators can be programmed to act like human fingers. The configuration of actuators allows users to test and simulate many functions on the touch screen.

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Remember, aftermarket replacement screens DO NOT provide the moisture seals, response, and drop performance so please use Apple Care or a Certified replacement brand such as eVero. Your iPhone is worth it.

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!

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Let’s say you have an iPhone and want to see why it’s experiencing performance problems. Or maybe you want to buy a used iPhone and see if there are any problems to know about. Or perhaps as a reseller, you want to make sure the phone you’re selling is in optimum condition to maximize the price for the iPhone and minimize returns and future repair problems. There are many reasons to run a complete phone hardware diagnostic test. Ultimately, these tests let you know how well the device operates and what problems need to be addressed.

With certain Android devices, you can dial in codes in the phone’s app dialer — such as *#0*# and *#*#4636#*#* — to access a hidden diagnostic menu or usage information menu. You can also dial *#*#0*#*#* to test the LCD screen or  *#*#2664#*#* for a touch-screen test.

However, you either need a third-party app, remote help, or extensive Apple Customer Support assistance for an iPhone. Let’s review the different ways to run an iPhone hardware test.

Apple has a team of educated technical support for its customers, so many iPhone users like to start there when they have problems with their devices. To get device support from an Apple technician, follow these steps:Call Apple support or go into the Genius Bar at an Apple store by making a reservation for a time slot online or over the phone. In some cases, a visit to the Genius Bar is mandatory. For example, if you have iOS 10, you’ll have to get onsite help to access diagnostics.apple.com.

You can also do remote mobile testing with your iPhone.You don’t need the phone itself for this testing; just its IMEI (International Mobile Equipment Identity) number. The IMEI is a unique 15-digit number that enables your phone to access cell phone networks. It can also provide you with the complete history of the iPhone, including whether it has ever been stolen or previously  refurbished.

Another way to find out about the condition of your device is to run a third-party testing phone app. You have various choices, and some may include insurance, trade-in, and repair shop location features. Instead of relying on guesswork to find out what is wrong with your phone, these diagnostic testing apps can scan your device to find out what needs to be fixed or point you in the right direction to find a solution.

This service provides an easy way for used phone resellers to do full tests on high volumes of devices, ensuring they are in optimum working condition. The Phonecheck software will scan phones for dozens of test points in less than two minutes, providing notifications about the iPhone hardware test, signal strength test (for Wi-Fi, Bluetooth, and cell signal), microphone functionality, speakers, and more.

You can print out a certification to go with the phone at the end of a test, giving your customers buying confidence. Check out Phonecheck’s complete device processing solution as the best way to build trust between buyers and sellers in the secondary market.

Running a reliable diagnostics test on an iPhone is important to build trust and transparency between the buyer and seller. Without hidden defects, a phone can be bought and sold with confidence.

As an iPhone reseller, it’s important to run a realistic diagnostics test to ensure the devices you buy and sell are running optimally. A diagnostic report can help you make necessary repairs, command the best prices, and provide customers with the peace of mind that comes through a device certified in good working order. Doing this before buying or selling an iPhone strengthens the relationship between buyer and seller.

With a diagnostic test, you can identify what’s wrong with the phone, so you can repair it or let the customer know about the defect so they can buy with their eyes wide open. A test can also reveal if there is sensitive personal information still left on the phone that needs to be wiped clean for security’s sake.

To provide you more detailed instruction, you can also click ASUS Youtube video link below to know more about Troubleshooting for No display on LCD Monitor

If the model had attached with the power supply (AC-adapter), make sure the power supply has connected to the screen. Please check if the light of power supply is ON. If the light is NOT ON, change another power supply to test.

Are there any regional differences inpower specifications thatASUS LCD monitor supported (for example: If monitor was bought in Taiwan, can it be used in China or other countries?)

ASUS LCD monitor can support power specification: AC 100-240V. As long as within this voltage range, the display can work properly. However, please be noted that if you bought a monitor from another region, the power cord is not necessarily compatible to power outlet. Customer should replace the appropriate power cord or plug adapter in order to ensure normal power supply of the display.

In Union Repair store, we grade our iPhone screen into 5 different types of quality on the basis of different material assembled. The following is the full details of each condition.

It is with widely accept major complaint replacements for original parts, which keeps a right balance between price and quality. It has sustainable supplying chain in China, and all the components of the screen are copy quality. Typically, the LCD screen is from several different factories, the most popular 4 on China market are JK,AUO, LongTeng, and ShenChao. By comparing the brightness and sharpness of the LCD, we found JK is the best quality among them and the second best is AUO. No doubt, the other components on the screen are all copy.

It is better than After Market Basic cause it comes with original laminated flexes and the LCD panel. Other components like touch panel, frame(hot pressed), backlight, polarize lens, and OCA is all copy from different factories.

The core components (like LCD and flexes) is 100% original pulled from used iPhone while the frame and touch panel is copy. The touch panel and frame come together with cold pressed glue and assembled together with the LCD by the capable third-party factory which keeps its excellent quality.

No doubt, it is tear down from used iPhone with all the parts 100% original and working perfectly just like an original new screen, it has whatever the original new screen has. The only complaint about this quality is that some of the displays are with 1 or 2 scratches but still be welcome by our critical customers who are requiring good quality.

It is 100% original from Apple-authorized factories like Toshiba, Sharp, and LG. We get this kind of screen from the first level dealer. The touch panel of the screen is oleophobic coated which prevents from fingerprints when using your iPhone. And starting with iPhone 7g, the backlight from different authorized factories comes with a different code. Backlight from Sharp has the code begins with DKH/CON, from Toshiba begins with C11/F7C/FZQ, from LG begins with DTP/C3F.