Hey TRZ, thanks for responding. The Save function now works properly so the new battery definitely solved the orig problem but I don't think the battery has caused this new issue either, and I was pretty careful to spray the contact cleaner only into the holes on each pot though some of them were pretty buried. But something else happened last night. Using a little old school TV troubleshooting 101 technique, I worked a little more with the amp, and with the static/buzzing sound going on I gave the amp head cabinet a light rap with the bottom of my fist to see if it was a loose connection causing the noise and sure enough, as I moved along the top of the amp from right to left (facing the amp) the static/buzzing began to fade until it was completely gone. If I continued tapping, this time moving back to the right side of the amp, the static/buzzing started to come back. I then rapped directly over the left-hand top corner and the sound disappeared again. I then remembered that when I was inside the amp earlier to change the battery, I had noticed the input jack (which is directly below where I was rapping when the sound vanished) was not quite horizontal so I loosened the plastic nut and gently twisted it around, only a degree or two so the PCB was horizontal, and then tightened the plastic nut back down being careful not to over-tighten. I suspect in doing so I may have pulled on a wire without knowing or tightened the jack too much??? Not sure, but I am going to open it back up and check it this weekend.

Andy