No Video (Analog Pc Signal) - Samsung LN22C450E1M Service Manual

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 SETD-10 (SX1)
-
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
BD909, BD910, BD911(R,G,B)?
Yes
Does the digital data appear at the
output of LVDS Signal?
Yes
Check a LVDS cable?
Replace a lcd panel?
Input a analog PC signal and
No
connected cable(DPMS).
No PC cable. Change a PC cable.
Change a main PCB ass'y.
No
Check a IC1102.
Change a main PCB ass'y.
No
Please, Contact Tech support.
4. Troubleshooting
4-3