Samsung GH15LS Service Manual page 13

4 Troubleshooting
4-2 No Video
Does the H-sync pulse
1
appear at Pin 9 of IC108?
Yes
Does the H-sync pulse
4
appear at Pin 150 of IC105?
Yes
Does the V-sync pulse
2
appeaer at Pin 30 of IC301?
Yes
Does the V-sync pulse
3
appeaer at Pin 148 of IC105?
Yes
Does the clock pulse
5
appeaer at Pin 44 of IC105?
Yes
Do the pulse appeaer
6
at Pin 43 of IC105?
Yes
Does the waveforms
appeaer at Pin 3
7
and 16 of CN201?
Yes
Replace LCD Panel
4-2
No
Check CN102.
No
Replace IC108 or
check its related circuit.
No
check CN102.
No
Replace IC301 or
check its related circuit.
No
Replace IC105 or
check its related circuit.
No
No
Replace IC251 or
check its related circuit.
GH15LS/GH15ES/GH15MS