On Friday, January 22, 2016 at 5:34:38 PM UTC-5, Cursitor Doom wrote:
On Fri, 22 Jan 2016 22:28:23 +0000, Cydrome Leader wrote:

No load could also cause weird noises- that board looks really old. If
that transformer is burned or arcing it's already trashed- more testing
won't make the problem worse, but giving it with no load or with no load
and at a weird input voltage won't help troubleshoot anything easier.

Yes, the world of vintage has its pros and cons. The plus side is
everything is big enough to work with - handy if you are half-blind and
clumsy like me. But the con is things get very fragile so you have to
think thrice before disturbing anything (and there's quite a bit on this
board that's been disturbed before due to previous issues.)

Interesting problem. Many great suggestions have been put on the table from different members so there is not much to add. The resister that is running too hot is telling us something. Why is that resister not a happy camper? What is it connected to. There is a hiss or possibly plasma arcing and a resister that is not happy. looking at a diagram to see what the unhappy resistor does in the power supply could provide a clue.