Acer AT2245 - Chapter 5 Trouble Shooting

31
Trouble Shooting
No picture (LED orange)
Cha
p
ter 5
Change key board/IR board
Check U401 Change U401
Check I
2
C bus
Check key board/IR board
Check I
2
C communication
No picture
OK
NG
OK
OK
NG
Check 24V power supply
OK
Check IC971 power supply circuit
NG
NG
Check main board Standby power supply
Change U902
OK
NG