Since you have no sound from both channels? I would think your problem is with the power supply. Same supply for both left and right channels. If you have a phono section it also has one for it. If your tubes all light-up, then I would bet your B+ went out. Probably one of the regulators. I think you will need to send it to a shop. They are not difficult to work on.
CJ PV-10 no sound
I installed a couple of GE 12AT7WA's (bp triple mica, aquired on E-Bay)into my CJ PV-10 today, and as soon as it came on, snapping sound and a hum. Now, no sound coming from pre-amp. It appeard as if one of the tubes shined brighter than it ought to prior to this happening. I'm going to go and get a new fuse to rule that out, but it looks OK. (BTW, so much for a the tube tester. Tested very good, no shorts!). On a seperate note, if I'm not able to get it fixed right away, I've tried running my NAK 670zx directly to my Classe 15 amp, and running my X-Ray CD player through the cassette deck. Sounds great (although I ALWAYS miss my tube sound). Any problem with this? Thanks