My power amplifier has just stopped working. It's a Rose English made
70W stereo amplifier, about 20 years old. Here it is with the top off:

http://flic.kr/p/mbRV1M

When I switched it on there was a noticeable 'phutt', but no noise at
the speakers. Now nothing - no mechanical or electrical noise, and the
power LED doesn't come on. Also, when I disconnected the speaker cables,
one had sheared off at the banana plug. So a short is a possibility.

I've checked the 4 internal fuses and the mains 5A fuse for continuity.
All fine.

Any other diagnostics I could do, given limited understanding of such
things and a basic multimeter? A likely cause?


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Cheers, Rob