Channel 1 not working on Pro Reverb

[Lespaulsignature 74]

I just got my 66 Pro Reverb back from the repair shop after having all new tubes installed and biased. I also had a new brite switch installed in channel (2) two. Unfortunately, I didn't check the amp out before I left the shop because I was in a hurry and I never had a problem with the Amp Tech. When I got it home and played it I discovered that channel (1) one is totally dead, not even a hum...complete silence?

What could have caused this to happen. Both channels worked prior to having the new tubes and brite switch installed?

Thanks

[smolder]

try swapping out V1 and V2... if channel two is then not working, you know it is the preamp tube.

[jay42]

It could be a tube which was just about to die, or a wire could have broken clean after the last time he had it running. If it's a tube, you don't need to contact him, which would be more convenient than schlubbing it back in.

[schmidlin]

I would take it back. He should check that stuff.

[Lespaulsignature 74]

Thanks guys, I will swap the V1-V2 tubes and see what happens. These are brand new tubes but I'm sure it's possible I could have gotten a defective tube.

[SatelliteAmps]

Brand new tubes can break. It happens. I'm sure the tech is used to things like that happening occasionally.

[Lespaulsignature 74]

OK, so I swapped the tubes and the 12AX7 in V1 was bad. As I was attempting to pull it out to replace it it cracked in my hand! I had to wrap it with duck tape in order to get it out in one piece! Thank you all for the good advice!!!!

Peace