Trouble Shooting Flow Chart - ViewSonic VLCDS23722-1W Service Manual

Does picture
display?
NO
Back-light
on or off ?
off
Check power
LED
Orange
Check display
resolution
Check I/F board
OSD no response
Picture dim
The brightness is
different between upper
and lower side of panel.
Picture without color
Vertical, Horizontal
out of sync
One or more colored
vertical lines
Even (or odd) vertical
line is dark
ViewSonic Corporation
7.

TROUBLE SHOOTING FLOW CHART

YES
A dark picture or a
picture full of
on
colored vertical
lines
Hsync, Vsync
or DE error
Green
Check inverter
Check I/F board JP6
Check SW board S1~S5
Check OSD adjustment
Check Inverter Check
backlight
RGB signal
error
Check connector board
Check I/F board
H,Vsyn
Check LCD panel
c error
Check LCD Panel
Check connector board
JP1,JP2
Check I/F board CN3
Check LCD panel CN1
11
Confidential – Do Not Copy
Check I/F board
Check Sw board CN1
Check Inverter Check
I/F board
VE500-1