Lenovo L215P Service Manual page 42

22" LCD Color Monitor
2.) W / LED, No Backlight
Check CN902 pin6= 12V
Check ON/OFF signal
Check IC801 PIN12=12V
Check IC801 PIN9,10 have the output of square wave at short time
Check Q804 and Q809 PIN5, 6, 7, 8 have the output of square wave at short time.
Check the output of PT801 and PT802
Check connecter & lamp
OK
NG
OK
NG
OK
NG
NG
OK
NG
OK
OK
NG
Check adapter or MB
Check Interface board
Change Q801, Q802
Change IC801
Check Q804, Q805, Q806, Q809, Q810 and Q811
Change PT801 and PT802
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Lenovo L215P Wide