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No picture with S-VIdeo
input source
Check Computer source input stage;
Check IC01 and peripheral circuit.
Check sync signals <PC_V> and <PC_H>.
No picture with computer
(rGB analog) input source
No picture with VIdeo
input source
No
No picture with computer
(rGB ScArt) input source
No
Yes
Yes
No
SG:
PC_RGB signals are sent to IC01.
Sync: PC_HS/VS signals are sent to IC01.
Check AV source input stage;
Check Y/C signals at IC01 and peripheral circuit.
Yes
SG:
Y signal and S_C signal are sent to IC01.
Sync: Y/C signals are sent to IC01.
Check Computer source input stage;
Check RGB SCART signals at test points PC-R/G/B.
Check IC01 and peripheral circuit.
Check sync signals <ADHS> and <ADVS>.
Yes
SG:
RGB SCART signals are sent to IC01.
Sync: SCART_CV signal at 1 pin of D-sub_15 is sent to IC01.
Check AV source input stage;
Check IC01 and peripheral circuit.
SG:
Composite video signal is sent to IC01.
Sync: Composite video signal is sent to IC01.
Troubleshooting