ViewSonic VG2021m-1 - Page 55

ViewSonic Corporation
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Defect Mode Failure Analysis Repair Testing
Abnormal BIOS
&OSD
Check PCB
Check Wire
AD/B Change
CNT/B Change
OSD cable
OSD No
Display
OSD Key
Unavailable
OSD Can’t
Input
OSD Can’t
Read
OSD Jiggle
OSD Display
Abnormal
Check BIOS
Inverter/B
Power/B Change
OSD/B Change
D-sub cable
VGA cable
DVI cable
BIOS Update
Abnormal
Loudspeaker
Check PCBA
Check Wire
AD/B Change
CNT/B Change
No Voice
Voice Loss
Abnormal
Loud
L/R
Abnormal
L/R Same
Volume
Check Loudspeaker
Inverter/B Change
Power/B Change
OSD/B Change
OSD Cable Change
Loudspeaker
Change
Loudspeaker
Noise
※ “ Panel Change” Should be Performed to Level 3 Repair
stage
Completed
Next Step
TEST
NG
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