Michael Black wrote:

I got this as an anniversary gift from my company. Sony model DVD-
NS75H. I searched this group and found nothing on this particular
model. Too much trouble to return, so either I repair or trash. Since
day one when playing a DVD, the picture slowly alternates between
normal brightness, to dark (not black), back to normal, to bright, and
so on. I don't have much experience with DVD players, but was hoping
someone in this group could tell me what they think is happening and
where to start looking for a possible fix. Thankyou as always.


And how have you got it hooked up?

That sounds identical to what happens when playing a DVD player
through a VCR into the antenna jack of a tv set. The VCR being there
to turn the video signal into a radio signal for the tv set. The
problem is that there is copy protection built into some VCRs, and
that starts doing what you describe.

The copy protection (Macrovision) is not built into the VCR. It is
embedded into the video signal. It screws up the AGC of the VCR, and
thusly affects different VCRs differently.

Never hook up a DVD player through a VCR, unless you remove the
Macrovision first. Hook the DVD player directly to the TV.

--
GO LUNA ROSSA! Beat the Kiwis.