Dead-ish Yamaha HS80m

[Repoman]

Originally Posted by Repoman

I was wondering if anyone can help.
The other day I fired up my desk and monitors for the first time in a few weeks, and my left HS80m turned on, but no sound. I found that if I drive the sound really hard/loud to the monitor I get a horrible distorted, all bottom end mess and everytime I turn the monitor off and on I get a very bass heavy pop that causes the woofer to flex wildly.
They are unfortunately out of guarentee and the cost of sending it off to
Yamaha isn't really cost effective, plus I'm very short on cash at the moment.
I've had it in bits today and have a fairly decent multimeter that will allow me to test capacitance up to 800uf, so I was able to test most of the board apart from two large 2200uf caps that appear to be in good shape (no leaking, not domed)
Anyway I think I've tried all the other obvious things such as swapping leads, channels etc.... but they do switch on and I can't think of anything else, can anyone suggest what it might be?? Thanks in advance for any help.

Could anyone at least recommend a tech in the UK that could repair this??