TFT Screen Not Working when Power Turned On


My TFT display screen does not light up when power is turned on. No picture is displayed.


There are 3 probable causes for this problem which can be quickly checked:

  • The power supply is faulty, or is disconnected
  • There is no video signal to the TFT screen
  • The backlight or AD board may be faulty


Here are the possible solutions to be checked for each of the above causes:

Step 1

Check the power supply to the TFT.

Step 2

Test another working TFT in the host machine, to determine that a video signal is present.

Step 3

Replace the backlight or AD board.