ViewSonic Pro8400 Series VS13647 - Troubleshooting Light Up and Volume Issues

Fail to light up
Refer to LED
indicator and follow
indicative actions
Replace
Lamp Module
Replace
Power board
Replace
Ballast
Replace
Main board
OK
OK
OK
OK
OK
NG
NG
NG
NG
NG
Check
Main board
Check Ballast
Check
Lamp life
Check LED
indication
Check PWR 380V
output
Replace
CW module
NG
Check CW
Rotation while power
on
No Volume
Replace
Speaker
Replace
Audio board
NG
NG
OK
Check
Audio board
Check
Speaker
Check
Main board
Replace
Main board
NG
OK
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ViewSonic Corporation
Pro8400
28