Added a speaker & grille cover after teardown, solder re-flow / check and general clean out of this Bandit 112 - Solo Series (Teal ’91). LOUD, crisp & clear clean channel… Lead channel seems good until activating gain switch. Hiss (“white noise”) increases proportionately from 0 - 10, both with and without anything input. Never having had any Peavey before… wondering if maybe this is normal or if I should begin checking resistors, transistors etcetera? And IF a common problem, maybe someone could point out the “Usual Suspects”? Hiss ONLY present with gain engaged. Mind you… rare that I might ever even use the lead channel - but the power of OCD compels me. Seems that there should be a filter (or somethin’) in that lead channel gain circuit to easily correct / replace? And yup, sprayed cleaner into that gain switch from above, below and into the front. No change. So either it’s normal… or something relatively simple is amiss? Otherwise, completely impressed with this old amp.