Hi there. I thought I would ask here regarding my issues before sending my head off to a technician. Stupidly, I switched on my DSL without being connected to my cab, this blew the main fuse. I replaced the fuse and decided to test the bias readings on the amp. From the left bias pin to the center, it is reading 75mv, but from the third pin to the center l, its reading 7v. I've swapped out all the valves, used different cabs, speaker cables and different output jacks but it remains the same. I have run a multimeter between pin 5 of the power valve sockets and the chassis, all four sockets are reading a steady -40.1v DC over prolonged periods. This does not change between standby being operational and non operational. I've removed the chassis from the case and had a thorough visual inspection with nothing looking burnt, bulging or any other visual signs of damage Its from this point where I'm not sure where to continue my process of elimination. Any help would be gratefully recieved.