one channel dead as a door nail

tubes are brand spanking new. But it's probably the amp. I switched the pre amp ICs out to amp + and - and the sound, still, is dead in the same speaker, so it's not the pre. Fuse possibly?

switched the tubes just to see. Newbee, you're the man. Good thing I saved the old 845s. Three month old Shuguang 845Bs! This can happen? Inherent problem with the tube? The amp?

Welcome to the world of tubes! You just popped your cherry.
Always keep extra 'bulbs' on hand.

John

First, I don't think your allowing nearly enough time for your pre-amp tubes to warm up. Give them at least a couple of minutes before switching on the amplifier in the future. Then make sure all of your connections are firm. (I had a cleaning lady dust behind my equipment rack, inadvertantly disconnecting a speaker cable with the result of one "dead" channel). Then check your fuses and tubes. I hope this helps,

My pre amp is on a constant standby mode. Always toasty. There is a delay of about 20 seconds when I turn it on. When the digital lights go on, it is good to go. My amp also has a standby mode, so it is always toasty, as well. Newbee called it!!