Samsung LA22B350F2, Service Manual

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4-3
4. Troubleshooting
4-1-2. No Video (Analog PC signal)
Symptom Audio is normal but no picture is displayed on the screen.
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Major
checkpoints
Check the PC source
Check the M-star
This may happen when the LVDS cable connecting the Main Board and the Panel is disconnected.
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-
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Diagnostics
LA22B350F2 LA22B450C8
No PC cable change a PC cable.
Change a main PCB ass’y.
No
Does the digital data appear at the
output of LVDS Cable?
Power Indicator is off.
Lamp on, no video.
No
Check a PC source and check
the connection of DSUB cable?
Check a IC4000.
Change a main PCB ass’y
Yes
Check a LVDS cable?
Replace a lcd panel?
Does the signal appear at R4059,
R4058, R4056, R4061,
R4060(R,G,B,H,V) of IC4000?
Please, Call to Samsung Co. LTD.
Yes
Yes
Input a analog PC signal and
connected cable(DPMS).
Yes
1
Yes
2
3
Caution Make sure to disconnect the power before working on the IP board.