how to test lcd screen in stock

To learn more about best practices on handling and using a Dell laptop, see the Dell knowledge base article Best Practices for Product Use and Handling for Dell Laptops.

WARNING: Use of controls, adjustments, or procedures other than what is specified in the User Manual may result in exposure to shock, electrical hazards, and/or mechanical hazards.

To learn more about safety instructions, see the Dell knowledge base article Safety Precautions When Working with Electronic and Electrical Equipment.

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

If the LCD built-in self-test (BIST) diagnostic test passed, the laptop LCD screen is working correctly. The display problem could be due to an outdated graphics driver or incorrect video settings. Follow the troubleshooting instructions in the Dell knowledge base article How to Troubleshoot Display or Video Issues on a Dell Laptop.

The most common issues of Android screens are dead and stuck pixels. Dead pixels occurs when small color pigments of your screen gets busted, resulting to a black spot on your screen, while stuck pixels are color pigments of the display that are frozen, unable to change to other colors like it normally should. These issues can easily be avoided if you can detect it while the problem is still not that severe. That"s why testing your LCD display is outright important and needs to be done frequently to avoid any issues from worsening.

@jesse, I"ve only done it a few times but haven"t had any unpleasant collateral damage. (I"m a small home-based shop, not a store front.) Usually, I have some defective screens that still show a partial image, or at least light up if the screen shows no image. For CCFL screens, I have a tester that illuminates the screen if it or the inverter is not burned out but as @NEWTWizz says, most screens are LCD now so it rarely gets used any more.

I don"t stock commonly used screens because they end up sitting around forever, but there is a thread on TN of which screens are most popular and worth stocking. If I did, I"d probably use one of them. Too bad about your rotten luck with that screen zapping something but I know of no way to know whether that might happen with any give test screen. I"m sure the major screen distributors like laptopscreens.com have a program that could tell you whether the test screen will be compatible with a given make/model laptop but that"s no accessible to us, unfortunately.

I"d only add that you can crank up brightness a bit, as stores tend to be rather bright, and then cycle through several different solid background colors. Make sure to set the taskbar (if in windows) to auto hide so you get the bottom edge checked as well. Most stores with tech departments (Fry"s Service Department, Best Buy Geek Squad) should allow you to open the monitor you"re planning on buying and connect it to one of their computers for this testing.

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We hope this application will add value to your repair business and would greatly appreciate a positive review on the play store and encourage any comments or suggestions to be posted in the comments sections on this page. We will ensure that this application gives users the best standard for checking their LCD screen displays!

Screen Position – Choose to run the test in default or portrait mode. By default and suggested is portrait position. Your phones “Screen Rotation” feature will be disabled when the application is open and be restored on exit.

Brightness Level – The applications brightness level setting by default is set to 100%. On load, the device’s brightness level will be configured to this brightness level.

ColorSelection – Choose color pallet sequence. Choose full color range ROYGBIV, Red Green and Blue or just Black and White. Recommended is ROYGBIV full range of colors, but 90%+ of dead pixels and defects are possible to see with a reduced amount of color pallets.

White Position – The white color pallet tends to find a large range of defects. First cut white/position on. Then select “First” or “Last” position to position when the white color pallet will display in relation to the “Color Selection” pallets selected.

Welcome Image – The image that will scroll at the beginning of each LCD test. Can cut on or off. Color pallets are great, but a high resolution photo can often times quickly identify LCD screen defects right away. By default, high resolution pictures are loaded for each screen position mode. You can change the image for each position by selecting the “Choose” button. The application will browse your file directory.

Automatic – No user input is needed during the test. Welcome image and color pallets will automatically scroll till the end of the test unless you pause the test.

9. Bulk Testing Mode (On/Off) – Made for power users who need to test multiple LCD screens in one sitting. When bulk testing mode is on, the interface will give the user functions that make the transition between screen tests both safe and fast with minimal interference. (Power off options for safety and auto-start when next LCD screen is connected loops)

Power Shutdown After Test– In any mode, the power to the LCD ONLY will power off (signaled by an audio tone). Select yes or no to activate this feature.

Shutdown Method – Automatic will result in the power off of the LCD screen after the test is complete. On result will require an input to the LCD screen or buttons to finish the test and then power off the LCD screen.

Automatically start of new test when power on – On resume of power off mode enabled, the application will automatically start a new test. When option is “No”, user will be prompted on power on to resume to a new test.

Digitizer / Touch test is completed when all areas of the LCD screen have turned from white to green after a successful touch from a previous white dot to the next.

Why do you have an option to power off the LCD after the test? – With no electricity or data flowing through the flex cable, you will reduce the chances of electrical shock and have prevent damage to the main board and/or LCD assembly.

What if the LCD or Digitizer Touch Panel fails and I want to end or move on to the next test? – Hit the phones back button at any time during the test. A prompt will give you the option to resume, exit to home menu or move to next test / end test.

Bought a new smartphone or want to check on the old smartphone matrix display? In this program you can test your LCD screen for the presence of dead / broken pixels and repair it. You can detect any stuck or dead pixel on your LCD screen.

If you detect any stuck or dead pixels you will be able to try to cure them. Provide easy way to fix the stuck pixel. The program will try to use different means for the treatment of stuck pixels. Also works for screen burn-in. Start and wait on the smartphone or tablet this app until the dead pixel or stuck pixel has been repaired or unstuck.

Dead pixel is stuck point or several points of the matrix screen, which does not properly reflect the color. Sometimes they are almost invisible, and you can be the owner of them without even noticing it. There are several treatments for dead pixels screen. Mechanical - physical impact directly on the affected area and a soft-that and it has me. We strongly recommend not to use the first method is for advanced users, as it is dangerous for the screen matrix.

The program can repair: Partial sub-pixel defects, Stuck sub-pixels, Dead or Broken (bad) pixels, Stuck versus dead pixels, Dark dot defects, Bright dot defects, phantoms (matrix burnup).

If within a few hours of program works the pixels is not revived, so they can not be brought back to life in this way - contact the service center. Fix your screen with this programm.

Please note: This S300 device updated to latest S800 testbox which more powerful and price close, so S300 will stop selling soon, so if you want to buy S300 testbox we advice to buy S800 device from our website.

This is a 6in1 S300 test box that supports screens for iPhone Samsung Huawei Oppo Vivo and Xiaomi. Update to 2022-12-31, it has 271flex cables that support 567different models.

System version after 2022-11-07 there is an important update that system file for Oppo Vivo and Xiaomi will be put in USB disk to save storage to have more useful functions for S300 device. To be short, after updating this version, the device includes system files for iPhone Samsung Huawei only, if you want to test screens for Oppo vivo and xiaomi as well then you need to connect USB disk when testing these screens, if only need to test screens for iPhone Samsung Huawei then no need to connect USB disk.

It has an extra display on test box which you can see the screen voltage and currency itself, from this function you will be able to find whether screen get some problem

Market many people sell TFT LCD as OLED screens, as their currency is different so you will be able to find whether they are selling fake OLED while it is a TFT screen.

S300 can test touch panel only which means if the inner LCD broke you can switch to the “tp test only” model and test whether its touch panel is able to recycle. And still, as touch panel testing only model you can identify 8 Plus and below from Incell structure to other qualities.

If you bought an S300 box before, you can update the system to support all these models for iPhone Huawei and Samsung Screens, just buying a flex cable set is fine.

This handy test cable makes it easy to check the functions of an iPhone 6 LCD and Digitizer without having to complete the installation and close up the iPhone"s case, making it indispensable to anyone who makes multiple iPhone 6 repairs. With this cable installed in an iPhone 6 body you can connect, test, and quickly swap multiple replacement LCDs and digitizers without wearing out the delicate press fit connectors on the logic board.