I've got a Trace elliot commando bass amp, had it for a few years now. The other week whil practising the sound just cut out. Took it to be repaired, apparently the guy replaced the transformer and a few other things in it ( he wasnt there when i collected it so have to wait til tommorow to find out exactly what). playing a gig last night, came to the last song ( thank fk) and it cut out again, exactly the same as the other time. any suggestions. gigs lined up and no money or amp.