"Paul B. Webster VK2BZC" <paulb@MIDCOAST.COM.AU> wrote about television sets::
> Stick to buying those with Audio-visual input-output connectors.  This
> is a guarantee that they do *not* have a live chassis, since isolation of
> signal inputs is ridiculously expensive compared to isolation in the
> (switchmode) power supply transformer.

No, it isn't a guarantee.  My Sony KV1380 has AV inputs and audio outputs,
and it uses optoisolators on all of them.

The only way to be completely sure is to study the schematic of the set.

Or just use an isolation transformer.  Even if the set is isolated, running
it on an external isolation transformer can't hurt.

Cheers,
Eric