No Video (Analog Pc Signal) (Sx1) - Samsung LA22C450E1 Service Manual

4-1-2. No Video (Analog PC signal) (SX1)

Symptom Audio is normal but no picture is displayed on the screen.
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Check the PC source.
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Major
Check the IC1102(SX1).
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checkpoints
This may happen when the LVDS cable connecting the Main Board and the Panel is disconnected.
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Diagnostics
Caution Make sure to disconnect the power before working on the IP board.
Power Indicator is off.
Lamp on, no video.
Yes
Check a PC source and check
the connection of DSUB cable?
Yes
Does the signal appear at R581(R),
R582(G), R583(B) of IC1102?
Yes
Does the digital data appear at the
output of LVDS Cable?
Yes
Check a LVDS cable?
Replace a lcd panel?
Yes
Please, Call to Samsung Co. LTD.
Input a analog PC signal and
No
connected cable(DPMS).
No PC cable. Change a PC.
cable. Change a main PCB ass'y.
No
Change a main PCB ass'y.
4. Troubleshooting
IC1102.
4-3