"t@k" wrote in message
.. .
One thing I have found, is the sensor on the heat-sink is closed circuit
in the amp's present state (cold) - should this be the case?
NOTE: disconnected from board when tested.
--
t@k
(Invalid return address. Please reply to newsgroup).

I would say that the thermoswitch reading closed, is correct. There are both
open and closed types, but closed types in this application are by far the
most common. I have looked at the images, and C210 leapt out at me (
heatsink away from you, left side of board, just in front of centre
connector ). This cap looked as if it had a domed top. I have looked at this
from all the angles that I can, with the photos zoomed up, and it definitely
looks as though it is. If it is domed, then that would be the very next
thing that I would try with a replacement. I don't know how much actual
electronics knowledge that you have, but faulty electrolytic caps are very
very common, and a domed top is usually a red-flag giveaway. If it is, and
you decide to have a go and replace it, note that these caps are polarised,
so must be fitted the correct way round ( sorry if I'm treating you too dumb
here ). The board may be marked with a "+" symbol, but more likely from what
I can see, a bar at the "-" terminal. This corresponds to a stripe, usually
marked "-" on the cap body itself.

Arfa