Chapter 5 Trouble Shooting - Acer AT1945 Service Manual

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