AOC N27W551T Service Manual page 27

27'' LCD TV
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
2
Check I C communication
Check Panel inverter board
NG
Replace IC901 or Q901
NG
Replace Q704 or Q705 or Q706 or Q709
NG
Replace U32 or U21
NG
Replace panel
27
AOC N27W551T