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5 Troubleshooting
5-3 No Picture (TV, Video 1, Video 2)
Check Pin 8 (AGC)
of IC703 (CN402).
Yes
Check Pin 72, 73, 74 of IC402.
Yes
Does the signal appear at D405.
Yes
Check IC301 and replace mainboard.
GD15N*/GD15A*
No
Check replace the tuner.
No
Replace IC402.
No
Check related circuit of
D405 and replace D405.
CONFIDENTIAL
5-3
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