In message , T i m
writes
On Wed, 29 Mar 2017 03:55:09 -0700, tabbypurr wrote:

snip

If you get any time and can see any of the electronics you might find
something as simple as an on-board fuse or some such?


Triac would be a prime suspect.

Not so easy to spot or replace as a fuse to the non electronics tech
though. ;-(

Ok, it could be easy to spot if it's blown to bits but then not so easy
to identify without the bits. ;-)

Hmm.. I was switching mains AC with back to back thyristors before
triacs were invented:-)

Nevertheless, you are probably correct:-)

--
Tim Lamb