LG Flatron W2234S - Troubleshooting Display Issues; Backlight and DC Output Problems

2. Backlight can’t be turned on
No Backli
g
ht
Is there 16V
on pin9 of
IC501
NG
OK
Check pin8 of
IC501, is there
3V?
NG
OK
Check
Pin11&Pin14 of
IC501, it have
output or not
NG
OK
Check power
supply
Check I/F BD
R510/R511/C507
CheckIC501/R50
4/C503/C511
Check
U501/U502/Q506
/Q501/Q505/T50
1/T502
16