Samsung LRT19US Service Manual page 34

5 Troubleshooting
5-2 No Video (PC Signal)
Power Indicator is green.
Yes
Does a signal appear at
5
Pin No.4, 10 of IC102?
4
(H/V Sync)
Yes
Does a signal appear at
3 C100,C102,C104?
(R, G, B input)
Yes
Does a signal appear at pin
6
No.1~30 of CN400?
(LVDS output)
Yes
Replace LCD Panel.
5-2
No
Check IC102 or CN101.
No
Check related circuit of
CN101.
No
Check IC400.
WAVEFORMS
3
4
5
6