YES
NO
ON
OFF
GREEN
Hsync,Vsync
Or DE error
ORANGE
OSD no respons
e
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
color
ed
v
ertical lines
Even (or odd) vertical
l
ine is dark
Does
picture
display
Back-light
On or off?
A dark picture
full of
colored
vertical lines
Check
power
LED
Check display
resolution
Check inverter
Check I/F board JP1
Check LCD cable
Check I/F board JP4
Check LCD panel
J1,J2,J3
Check I/F board
Check SW board S1~S4
Check OSD adjustment
Check inverter
Check backlight
Check signal cable
Check I/F board
Check LCD panel
Check LCD panel
Check I/F board
Check SW board
J1
Check inverter
Check I/F board
RGB signal
error
H,V syn
c
error
or a picture
6
.
TROUBLE SHOOTING
FLOW CHART
ViewSonic Corporation
6
Confidential – Do Not Copy
VA930-1