Samsung LE32A55*P Service Manual page 27

4-1-2. No Video (Analog PC signal)
Symptom Audio is normal but no picture is displayed on the screen.
-
Check the PC source
-
Major
Check the SEMT01(MT8226)
-
checkpoints
This may happen when the LVDS cable connecting the Main Board and the Panel is disconnected.
-
Diagnostics
1
2
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 C3131,
C3133, C3136(R,G,B)
Yes
Does the digital data appear at the
output of LVDS (RA5104~RA5109)?
Yes
Check a LVDS cable?
Replace a lcd panel?
2
1
Input a analog PC signal and
No
connected cable(DPMS).
PC cable. Change a PC
No
cable. Change a main PCB ass'y.
No
Check a IC5105
Change a main PCB ass'y
No
Please, Contact Tech support.
4. Troubleshooting
4-3