Vizio VP50 HDTV20A Service Manual - Page 17

Trouble shooting - power board

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Chapter 9 Trouble shooting MONITOR DISPLAY NOTHING (PC MODE) Start LED is lighted Yes LED is lighting? Yes Is backlight on? Yes Yes U14 no data out? Yes END N0 1. Is Power board output +5VSB &DV12? 2. Is J10 connector good? 3. Is DC-DC OK? 4. Is U1 (+5V) working ok? It is in power saving N0 1. Check video cable 2. Is the timing supported? 3. Check sync input 4. Check VGA SOG rout if analog (SOG) N0 1.Check J10 PIN14 2.Is Power Board ok? N0 It means data to LVDS 1.Is J7 connecting OK? 2.Check J1 +5V & +12V 3.Is panel ok? 4. Check P3 D-sub Input correct 5. Check analog input route CONFIDENTIAL - DO NOT COPY Page 9-1 File No. SG-0246

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CONFIDENTIAL
–
DO NOT COPY
Page
9-
1
File No. SG-0246
N0
Yes
N0
Yes
N0
N0
Yes
Yes
Chapter 9
Trouble shooting
MONITOR
DISPLAY
NOTHING
(PC
MODE)
Start
LED is lighted
1.
Is Power board output
+5VSB &DV12?
2.
Is J10 connector good?
3.
Is DC-DC OK?
4.
Is U1 (+5V) working ok?
LED is lighting?
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)
Is backlight on?
1.Check J10 PIN14
2.Is Power Board ok?
U14 no data out?
It means data to LVDS
1.Is J7 connecting OK?
2.Check J1 +5V & +12V
3.Is panel ok?
4.
Check P3 D-sub Input correct
5.
Check analog input route
END