Ancient_Hacker said:
You might look over the front panel IC's. I seem to remember one
important IC tended to work loose due to the heat sink tab under it.
Thanks.
I had the front panel apart and re-seated all of those ICs too.
I did notice one sitting on a metal tab. Looked a bit of a bodge to me. And
the IC didn't have a good contact with the tab, nor had an exposed metal
bottom!
There are two axial electrolytics on one board. Very gentle pressure on the
pcb actually causes one of them to touch another smaller board (which is
mostly ground). I don't think that was the problem, but I've trimmed its
leads so that won't happen again.
The first problem I had with this unit (about two years ago) was that it
would only start in certain orientations. This turned out to be caused by
the oven oscillator not starting up. I had to disassemble this, and found
that the power wire was wrapped around its pin, but had never actually been
soldered. It just rested like that for 15 years!