I didn’t install hot swap sockets no, that’s why I expect that I maybe have made a cold connection or something when soldering the switch. Thanks for the advise though

I hadn’t really thought about the possibility of the switch being the problem, I might check that out if nothing else fixes it. Thank you

Thanks, I’ll have a go at the multimeter

Thanks. I didn’t install hot-swap sockets, but I’ll try you other suggestions.