Nakamichi AV1 repair

Hello all
I hope this is the right place to look for a repair service (commercial recommendations or a hobbyist) in Kent, UK. Please mods move or delete it if not.

I have one of these AV processors with an AVP1 amp but the other day it clicked off and is dead, no light on the standby switch. I checked the plug fuse and IEC socket fuse and both are fine so I suspect a power supply problem. I looked inside and nothing is obviously fried but that's as far as my diagnosis ability goes at present.

If someone local is willing to have a look I'd happily pay for their time or make a donation to their chosen charity, or if anyone can recommend a repairer in north Kent I'd be really grateful.

I know these units are cheap when they turn up but I hate throwing things away.