Lenovo L193 Wide Service Manual page 32

19" LCD Color Monitor
2.) W / LED, No Backlight
Check CN902 pin4, 5 = 12V
Check IC801 PIN9/10 have the output of square wave at short
Check Q802,Q803 (D) wave
Check the output of PT801, PT802
Check connecter & lamp
OK
Check ON/OFF signal
OK
Check IC801 pin12=12V
OK
NG
OK
OK
OK
NG
Check adapter or MB
NG
Check Interface board
NG
Change ON/OFF
Check IC801
NG
Check Q801,Q804,Q811,Q812
NG
Check PT801, PT802
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Lenovo L193 Wide