Vizio SV420M Service Manual page 20

Chapter 9
MONITOR DISPLAY NOTHING (PC MODE)
Start
LED is lighted
LED is lighting?
Is backlight on?
Panel has no data
out?
END
CONFIDENTIAL DO NOT COPY
–
Trouble shooting
N0
Yes
N0
N0
Yes
N0
Yes
Yes
N0
Yes
1. Is Power board output
+5VSB &+12?
2. Is J1 connector good?
3. Is DC to DC OK?
4. Is U1 (+5V) working ok?
It is in power saving
1.
Check video cable
2.
Is the timing supported?
3.
Check sync input
4.
Check VGA SOG rout if analog
(SOG)
1.Check J1 PIN14
2.Is Power Board ok?
It means data to LVDS
1.Is J9 & J10 connecting OK?
2.Check +5V & +12V
3.Is panel ok?
4.
Check P13 D-sub Input correct
5. Check analog input route
Page 9-1
File No. SG-0298