Lenovo L2060wA Service Manual page 40

20.0" LCD Color Monitor
8.2.2 Power/Inverter Board
No power
Check CN902 pin4, 5 = 5V
NG
Check AC line volt 110V or 220V
OK
Check the voltage of C907(+)
OK
Check start voltage for the pin8 of IC901
OK
Check the auxiliary voltage is bigger than
10V and smaller than 20V
Check IC901 pin5 PWM wave
Check Q903/D906/IC902/ZD921/ZD922
NG
NG
NG
NG
OK
NG
OK
Check AC input
Check bridge rectified circuit and F901 circut
Check R933, R934, R935, and Change IC901
1) Check IC901
2) Check R909/D901/C903 and OVP circuit
Check IC901,Q901
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Lenovo L2060wA