Last week i bought an Ampeg BA115hp and had to take it back the next day because the treble dial wasn't working right. When the guy went to to try and solve it it wouldnt even turn on!!! They ordered me a new one in and i took it home yesterday, everything fine. Second time i went to play this one wouldnt switch on either. Ive tried everything and it refuses to go on. Anyone know whats up with it?