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