I'm sorry but normally, I don't repair HiFi.
HiFi is rarely repaired down to the level (component level) that I'm used to and that the EMI (electronic musical instrument) market expects. Normally of modular design, HiFi repairs often involve whole subsystems being swapped out. Unfortunately, manufacturers and distributors of consumer electronics, don't keep spare parts in stock for too long, as they used to. Hence, procuring parts is usually a nightmare.
At 60 GBP plus VAT per hour, it's too expensive for me to fix HiFi systems down to component level.
THERE ARE EXCEPTIONS... My valve experience often tempts owners of high-end valve equipment to contact me. Manufacturers and distributors of high-end HiFi, tend to stand by their products and acquiring technical literature for example, is much easier then trying to do the same with manufacturers and distributors of more popular consumer electronics. At the end of the day, if I'm able to get appropriate support on a product, I'm usually to at least have a look at it.