Service manual

Yes
Yes
Yes
Yes
N0
N0
N0
N0
N0
Yes
N0
Yes
6-2 Troubleshooting Flow Chart
M
ONITOR DoeS NOT WORK
Start
Is LED lighting?
Is LED green?
Is backlight on?
Does U1 input?
1. Is adaptor’s output+12V?
2. Is DC Jack (P6) connector OK?
3. Is +5VX ok?
4. Check LED signal?
LED lights orange, monitor is in
power saving mode
1. Check video cable
2. Is the timing supported?
1. Is inverter OK?
2. Is P3 connected ok?
Check U1 input well; include
VGA_VSYNC, VGA_HSYNC, or
SOGI, and RI, GI, BI.
Does U1 output?
It means data to panel
1. Are P1and P2 connected well.
2. Check VLCD?
3. Check DHS, DVS, DCLK, DEN
4. Is panel ok?
END
Does volume out?
It means no audio
1. Check phone jack P7, make sure
audio signal input?
2. Check VCC & STB (Stand-by) of
U7
3. Is U7 output ok?
4. Are speakers ok?
ViewSonic Corporation
29
Confidential --Do Not Copy VG150m/mb