On Fri, 14 May 2021 09:39:36 +0100, "Brian Gaff \(Sofa\)"
wrote:

I'd check any capacitors in the unit, since one usually finds that depending
on the design, these can be critical for its efficient operation.

There was one that had a budging top Brian that seems to test out the
same as the others on my little automatic component tester but because
of the bulge and the PSU not working properly, I've ordered Panasonic
replacements and will test it again once done.

Luckily I also have a load tester that I use for testing batteries
that I can put on it once the caps are replaced and test it at it's
twenty amp rated load.

Cheers, T i m