Krell Showcase Processor/Pre Amp - turns out, clicking noise from power - relay?

Hello

I have a Krell Showcase Processor I use as a preamp.

It is not turning on (goes back to standby) and if it does turn on it either plays for a bit and turns off or it makes an off clicking noise. Someone thought this may be the protection circuit thing, relays clicking, is that likely?

Anyone know a good electrician in West London, UK?

Best wishes Edward

Linn LP12, Naim NAT02, Revox PR99, Meridian 557, Sonus Faber Domus Grand piano floorstander, Primare D20
 

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Thank you Duncan I will reach out to them, good tip! Its not that close but is the right side of London at least in High Wycombe!

I think Absolute Sounds will be too ££, its only £600 for the machine now.

Best regards Edward