Black Screen And Backlight Turn On - ViewSonic VX1933W Service Manual

6.6 Black Screen and backlight turn on

Black Screen
Check VCC
5V
OK
OK
Check Reset
Waveform
Check Crystal
Waveform
Check CCFL
Enable
U108fail
ViewSonic Corporation
NG
NG
NG
OK
NG
OK
OK
NG
Power Fail
Check
FB104
Check
FB102 FB103
Check C153
Check
C157,C158,X101
OK
Check
pin102 of
NG
Check R103,R105,R106,
and Q103
80 CONFIDENTIAL – DO NOT COPY
Invert fail
VX2433wm-CN
VX2433wm-1