A common question - How to test mobile phone and tablet LCD?
Sometimes, when a mobile phone or a tablet fall down on the floor, the screen is not broken but it does not disply anything - How to repair?
As we mentioned above, sometimes broken LCD is able to see crack clearly, but in some cases, it looks perfect screen which is called "faulty screen". However, we categorize the faulty screen into 3 types including:
- Dead pixel
- Blank display
- No backlight display.
For cracking and dead-pixel issue, you can see on screen obviously and the best way is to replace it. On the other hand, how to test the Blank display and No-backlight screen because these issues relate to the motherboard as well.
1. LCD Testers: At the Mobile Phone and Tablet Training, we use LCD testing machines for the different types and models of devices.
2. Testing the screen in the same model: If you have spare devices, this way is very inexpensive and useful.
3. Testing with new LCD: This is a simple way for new phone repair technician to repair. Just replace new LCD or whole LCD and digitizer to the device
However, if the 3 methods above are not working, that means the problem may cause from the motherboard and need to do soldering to repair