No Video (Pc Analog Signal) - Samsung Lacie720 Service Manual

4 Troubleshooting

4-2 No Video (PC Analog Signal)

Check signal cable connection and
power.
1
X201 oscillate properly?
Yes
Is there R, G, B input at
R127, R125 and R118?
Yes
Is there Hsync, Vsync waveform
2
at R115, R112?
Yes
Is there Hsync, Vsync waveform
3
2
at Pin 40, 41 of IC202?
Yes
Dose proper DC 5V appear
at Pin 2 of IC602?
Yes
Does the output signal
appear at Pin 8~13,15,
16, 18~23, 25~30 of CN602?
Yes
Replace LCD Panel.
(Perform Automatic Color Adjustment)
4-2
No
No
No
3
No
No
No
Replace or check related circuit.
Check input part.
Check input part.
Check IC202 and related circuit.
Check Panel Cable.
Check IC202, IC602, CN4003 and
related circuit.