Samsung LE23R32B Service Manual page 35

4 Troubleshooting
4-2 No Video (Analog PC Signal)
Power Indicator is off.
Lamp on, no video.
Yes
Check PC source and check
the connection of DSUB cable?
Yes
Does the signal appear at
1
R781, R782, R783?
Yes
Does the digital data appear
at output of
3
LVDS TX(R422~R425,
R430~R433)?
Yes
Check LVDS cable?
Replace lcd panel?
4-2
No
Input an analog PC signal and
connect cable.
No
Change PC Cable.
No
Check IC310.
Change main PCB ass'y.
No
Please call Samsung Co. LTD.