ViewSonic Corporation
49
Failure Analysis
Repair
Testing
Gray Scale
Display
Abnormal
R.G.B
Display
Abnormal
No signal
Display White
Out
Brightness
Even
Abnormal
Next Step
TEST
NG
Completed
B
Booting Delay
C
Beat Display
No Backlight
Check PCBA
AD/B Change
Inverter/B Change
Power/B Change
Check Panel
Check PCBA
Panel Change
Power/B Change
Inverter/B Change
CNT/B Change
AD/B Change
Check PCBA
VGA cable
DVI cable
Check Wire
Check Panel
Panel Change
OSD/B Change
Check PCBA
Adapter Change
Check Adapter
※
“
Panel Change” Should be Performed to
Level 3
Repair
stage
VG2021m-1
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