7
.
TROUBLE SHOOTING
FLOW CHART
YES
Does picture
display?
OSD no response
Picture dim
The brightness is
different between upper
and
lower
side
of panel
.
P
icture without
color
Vertical, Horizontal
out of
sync
One or more colored
vertical lines
Even (or odd) vertical
line is dark
Check LCD Panel
Check SW board S1~S5
Check I/F board
Check OSD adjustment
Check Sw board CN1
Check Inverter Check
I/F board
Check Inverter Check
backlight
Check connector board
Check I/F board
Check LCD panel
RGB signal
error
H,Vsyn
c error
Check power
LED
Hsync, Vsync
or DE error
NO
Back-light
on or off ?
on
A dark picture or a
picture full of
color
ed
vertical
lines
off
Green
Check display
resolution
Orange
Check inverter
Check I/F board JP6
Check connector board
JP1,JP2
Check I/F board CN3
Check LCD panel CN1
Check I/F board
ViewSonic Corporation
11
Confidential
– Do Not Copy
V
E
500
-1