ViewSonic VG500b-1 Service Manual page 15

The Ver. Or Hor.
Sync. Does not hold
Are two flex cables
Are the output of
Tighten two flex
Are two flex cables
Yes Yes No
attached firmly at
gm2115 (CLK,
cables at CN501,
attached firmly at
the LCD panel
H, V, DE)
CN502
connectors
CN501, CN502
normal
No
Yes
No
Tighten two flex
Are the input
Replace V901 (LCD
cables at CN501,
End
waveforms of
panel)
CN502
gm2115 normal
Yes
End End
ReplaceU400
End
ViewSonic Corporation
12 VG500b-1
Confidential – Do Not Copy