danyeo1
Well-known member
My Mark IV head, B version cut out while I was playing. All the lights on the front went out and no audio. However the amp powers up, the fan is on, and all tubes appear to be on. No burning smell. Could it be a tube issue even if the tubes all look good. These tubes are all less than a year old, all Mesa Tubes, and not a lot of mileage on them.
UPDATE. I've had it back for a few weeks. It turned out to be some caps that went and some of them were involved in the switching system. It is an old IV, 1991 is stamped on the chassis. $150 and it's up and running fine.
UPDATE. I've had it back for a few weeks. It turned out to be some caps that went and some of them were involved in the switching system. It is an old IV, 1991 is stamped on the chassis. $150 and it's up and running fine.