Image Noise - NEC MultiSync LCD2080UX -BKA Service Manual

3.3 Image Noise

Is noise being output even if H.SIZE
and FINE is adjusted?
NG
Replace the connection cable that is
extended toward the PC.
NG
Is there no change in the noise generating position,
period, color, etc., even when the resolution is changed?
No changes
Confirm whether the digital outputs of ICA01, IC4A1, and
IC401 are generated at the normal TTL level respectively.
OK
OK
Changes present
Normal
Normal
Check IC401 or its peripheral circuits.
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