So i own a evh 5150 III and while i was playing it in the second channel (the volume was at 3) asll of a sudden the sound cuts. I can't hear a thing and i can't even switch channels( not click from the relay switch). I leave it alone for a while (an hour). Come back and it works fine again. Just today i looked at my chassis and i noticed one out of 3 power tubes have been blown (white all at the top). Was my tube the culprit to my problem? Does a dead powertube affect the amp like that? and how could i still play with a dead powertube??