CONFIDENTIAL
4 Troubleshooting
4-2
GG15AS/GG15AS(R)/GG15L*/GG15L*(R)/
GG15V*/GG15V*(R)/GG15E*/GG15E*(R)
Check CN190.
No
Does the H-sync pulse
appear at Pin 43 of IC300?
Replace IC300 or
check its related circuit.
check CN190.
No
Does the H-sync pulse
appear at Pin 34 of IC300?
Yes
Yes
No
4
Does the V-sync pulse
appear at Pin 44 of IC300?
2
Replace IC300 or
check its related circuit.
No
Yes
Does the V-sync pulse
appear at Pin 33 of IC300?
3
Yes
Replace IC200 or
check its related circuit.
No
Replace LCD Panel.
Yes
1
4-2 No Video [GG15AS/GG15L*/GG15V*/GG15E*]
Do the waveforms
appear at Pin 15
and 18 of CN102?
5
6