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TECHNICAL SERVICE MANUAL
8.4 External Monitor No Display-1
There is no display or picture abnormal on CRT monitor, but it is OK for LCD.
External Monitor No Display
1. Confirm monitor is good and check
the cable are connected properly.
2. Try another known good monitor.
Display
OK?
No
Remove all the I/O device & cable from
motherboard except monitor.
Display
OK?
No
Yes
Replace faulty monitor.
Connect the I/O device & cable
Yes
to the M/B one at a time to find
out which part is causing the
problem.
Board-level
Troubleshooting
One of the following parts on the mother-board may be
defective, use an oscilloscope to check the following signal or
replace the parts one at a time and test after each replacement.
Replace
Motherboard
118
Check if
Yes
J501
are cold solder?
No
Parts:
U512
U2
D1
D2
D5
L2
L6~L11
Q1
Q4
C3
Prestigio Nobile 1510
Re-soldering.
Signals:
+3VS
CRT_DDDA
CRT_HSYNC
CRT_VSYNC
CRT_DDCK
CRT_RED
CRT_GREEN
CRG_BLUE
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