Thanks, fellas. I tried all I could think to try, including the above suggestions, last night. You all have confirmed the clear
answer, which is: repair, return, or replace.
I'll have to think it over. It's a lovely, small camera with a super viewfinder (see what I did there?). In a lot of ways I like it
better than my Canon AE-1 Program (aperture priority, better manual mode, viewfinder) and Minolta XG-M (better layout,
smaller, non-locking exp. comp). Only features things it's "missing" are AE lock and maybe DOF preview. On the other
hand, Pentax glass is pricier than Canon or Minolta...
Ugh.