External power supply -no power going to the pre


Hello just got back from vacation last night
This morning I attempted to switch on the external power supply and there is no power going to my pre amp

Any ideas what to check first before I send it to a technician
bluemike

Showing 2 responses by bluemike

Thx guys for your help
It was the fuse and luckily my pre amp had a spare inside the holder
Thx Sfar for your detailed response

Cheers