TCL L32F3300 - Troubleshooting: Video and Backlight Failures; No Backlight;Video Diagnosis Flowchart

2ǃOnly Backlight, No Video
Reset the
TV set
LVDS
Power(P902 PIN
1) is 12V ?
1ǃCheck the Q900 and Q901 is Working.
2ǃCheck the LVDS cable connect normally.
The P902
PIN13,31 clock is
normally?
Check the U500 working normally.
Check P402
RS232
information
No in
f
ormation
check the setting of Panel resolution(
PC RS232 command)
N
N
Y
Y
Y
Y
Check LVDS
cable.
Y
Appendix 1:How to enter the correct screen parameter through RC?
1ǃInputĀ062598+menu+xxx(Project ID)āon RC, the machine will off and on one time, if you
input the right Project ID, there will be video display.