I was playing tonight when I lost all volume from the amp save for a soft sputtering sound when playing. Here's what I've done so far: -Made sure it wasn't channel specific; same in all channels. -Plugged into the effects return; no sound. -Bypassed loop altogether; nothing. -Replaced power tubes; nothing. -Replaced rectifier tubes one at a time; nothing. -Replaced preamp tubes one by one; nothing. -Ruled out guitar, cables, etc. -Switched so solid state rectifier; nothing. Aside from sending it off for warranty repairs (nobody even close to me) what should be my next steps? Do rectifier tubes fail in pairs? If so, I'll need to grab another rectifier tube to test two new rectifiers simultaneously. I have not seen any arcing and all power and rectifier tubes light up when powered on. I didn't see or smell smoke.