AOC L27W451 Service Manual page 28

27'' LCD TV Color Monitor
5.2 Can not start (LED indicator yellow)
Check key board
OK
Check 5V_SB
OK
Check 3.3V_SB
OK
Check PWR_ON signal
OK
Check PFC circuit
OK
Check main board power supply
NG
Repair the key board
NG
Return to "5.1"
NG
Replace U701
Check Q704, Q705, Q706, Q709
NG
Check U32, U21
Check I
Check Panel inverter board
NG
Replace IC901 or Q901
NG
2
C communication
28
AOC L27W451
Replace Q704 or Q705
NG
or Q706 or Q709
Replace U32 or U21
NG
Replace panel