Service manual

Defect Mode Failure Analysis Repair Testing
Abnormal
BIOS &
OSD
Abnormal
Loudspeaker
Check Wire
AD/B Change
CNT/B Change
OSD cable Change
OSD No
Display
OSD Key
Unavailable
OSD Can’t
Input
OSD Can’t
Read
OSD Jiggle
OSD Display
Abnormal
Check BIOS
Inverter/B Change
Power/B Change
OSD/B Change
D-sub cable Change
VGA cable Change
DVI cable Change
BIOS Update
Check PCBA
Check Wire
AD/B Change
CNT/B Change
N
o Voice
Voice Loss
Abnormal
Loud
L/R
Abnormal
L/R Same
Vo l u m e
Check Loudspeaker
Inverter/B Change
Power/B Change
OSD/B Change
OSD Cable Change
Loudspeaker
Change
Loudspeaker
N
oise
※ “ Panel Change” Should be Performed to Level 3 Repair stage
Check PCB
NG
TEST
Next Step
Completed
45
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Do Not Copy VA1912W/Wb