Actually, I found the problem. A little white plastic finger is moved through the wafer by moving the fine tune knob and pushes in an actuator that moves a slug ostensibly. Probably this is how most tv tuners work, but I've not had a problem before on one, so this is a first. The "finger" on my ch 3 is jammed and stuck. I could take another channel's part but that would be too much work, so i'll just watch on ch 4, since that works fine.
