AOC LM960S Service Manual page 39

19" LCD Color Monitor
No backlight
Measure the voltage of F201=12V
Measure the Pin5 of
If pin11, pin12, pin19, pin20 of
Connect PIN4 of IC201 to PIN 7 of IC201, if
the picture is normal
OK
If Q204, Q208, Q209, Q210
OK
No backlight
OK
NG
IC201 = 5V
OK
IC201 has square wave
NG
OK
NG
Waveforms are normal
NG
Check feedback circuit
and lamp
NG
OK
Measure the
Q207 B = 3V
NG
Check main board
Replace IC201
Check D202, D204, D207,
D210
Replace Q204, Q208,
Q209, Q210, PT201
39
AOC LM960s
See the "No Power"
Replace Q205, Q206,
Q207