OK, so I have had this amp head out of the house maybe two dozen times. Anyway, you know the VU meter and how it lights up? Well, it ain't lighting up. At first I thought the bulb was gone but then it would light up and shut off again. The VU meter works, the amp works, it's just the damn intermittant (sp?) light. Also, the gain nob is loose and the pot it somewhat filthy (I reason this is because the two fans are right in back of the gain knob). Anyone else have these issues?