AOC N20W451T Service Manual page 23

20" LCD TV
6.2 Can not start (LED indicator yellow)
Check keyboard
OK
Check 5V_SB
OK
Check 3.3V_SB
OK
Check PWR_ON signal
OK
Check Q940 (VCC3)
OK
Check main board power supply
NG
Repair the keyboard
NG
Return to "6.1"
NG
Replace U703 or F702
Check Q703, Q708, Q704
NG
Check U402, U403
2
Check I C communication
Check Panel inverter board
NG
Replace Q940
NG
Replace Q703 or Q708 or Q704
NG
Replace U402 or U403
NG
Replace panel
23
AOC N20W451T