Sony SDM-S76D Service Manual page 40

17" LCD Color Monitor
No Backlight
Check C811 (+) =12V
Check ON/OFF signal
Check IC801 PIN2=5V
Check IC801 PIN1, PIN15 have square wave
CHECKS Q805, Q806 have the output of square wave at short time
Check the resonant wave of pin7 & pin8 for PT801/PT802
OK
OK
OK
OK
OK
Check connect & lamp
NG
Check Q805, Q806
NG
Check Interface board
NG
Check Q801,Q802, Q803
NG
Check IC801
NG
Check Q805,Q806, PT801, PT802
40
SDM-S76D/SDM-S76F
Change PT801 or PT802