Are all of the filaments in the tubes glowing? It may not be completing the warm up because of a bad tube.
McIntosh Tube Amp will not come on.
I have a fairly new MA352 integrated 200W tube amp/ SS Preamp. In the middle of the day, during normal operation, I powered it on, but the 4 tubes stayed orange. They will convert to a green "ready" state. The display just continues to say, "Tubes warming up." This phase of start-up lasts about 5 seconds. Now... It will not get past that phase. Has anybody else experienced this with McIntosh tube equipment?