Samsung LW15M23C Service Manual page 22

5 Troubleshooting
5-2 No Picture (TV, Video, S-Video, DVD)
Check C800(TV)
No
Check C822(Video)
9 Check the input signal.
Check C824(S-Video)
Check C821(SCART)?
Yes
Check the IC802.
WAVEFORMS
9
5-4 LW15M23C