Recently my Hartke Ha2000 has been acting up. At a gig last night, I noticed that it began to squeal badly when I powered it up. I reached over and hit the power switch, unplugged my bass(active Ibanez Soundgear 5 string, but the battery was replaced a week before, shouldn't be the problem, and it did it with my passive Fender Jaguar). I cycled the switch, plugged back in, and it works again. I finished the night without problems, but this is the third time it has done this. I feel a transistor somewhere is failing, (I'm thinking power amp), but I wanted to get some other advice on what it could be. Can anyone help?
