Trouble Shooting Flow Chart - ViewSonic VA930-1 VLCDS24020-1W Service Manual

Does
picture
YES
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
6.

TROUBLE SHOOTING FLOW CHART

ON
A dark picture
or a picture
full of
colored
vertical lines
GREEN
Check inverter
Check I/F board JP1
Check SW board S1~S4
Check OSD adjustment
Check inverter
Check backlight
RGB signal
error
H,V syn
error
Hsync,Vsync
Or DE error
Check LCD cable
Check I/F board JP4
Check LCD panel
J1,J2,J3
Check signal cable
Check I/F board
Check LCD panel
Check LCD panel
6
Confidential – Do Not Copy
Check I/F board
Check SW board
J1
Check inverter
Check I/F board
VA930-1