If you record and playback on the same machine, or play a tape
without macrovision copy protection, does the problem disappear?

Jenwin wrote:
I have Sharp VC-MH704 thats been working fine for the last 4/5 years
through the RF sockets, but never through scart.
It has even been used on 2 different TVs in this way with no problem.

However, now we have just purchased a JVC AV-28E50SK Digital Tv. (Also
purchased a DVD recorder and recently changed it to another model, but
problems occurs with both and without the dvd plugged in).

The problem is.....

The VCR will happily tune and playback the TV through both RF and Scart
sockets, but with either scart or RF plugged in, as well as both
plugged in, the video playback is distorted.

The picture is fine for about 5 seconds then it distorts diagonally
along and goes black and white with sound problems for about 3 seconds
and then is fine again and repeats.