Vizio L42HDTV10A Service Manual page 14

Chapter 9
MONITOR DISPLAY NOTHING (PC MODE)
Start
LED is lighted
LED is lighting?
Is backlight on?
U11 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
+5V?
2. Is J7 connector good?
3. Is DC-DC OK?
4. Is U6&U4 (3.3V) working ok?
It is in power saving
1.
Check video cable
2.
Is the timing supported?
3.
Check sync input
4.
Check VGASOG rout if analog
(SOG)
1.Check J7 PIN 14
2.Is inverter ok?
3.Is Power Board ok?
It means data to LVDS
1.Is J5 connecting OK?
2.Check J7 +5V&+12V
3.Is panel ok?
4.
Check P3 D-sub Input correct
5. Check analog input route
Page 9-1
File No. SG-0198