This repair is almost too easy to take credit for, but we all need some good news for a change.
I responded to a thread about old calculators and noticed that my old HP11c was dead... opining that I should probably remove the dead batteries to avoid incidental damage. I measured the three removed batteries and all three were definitely "not" dead... there was a smudge on one battery electrode so I wiped them off and reinstalled....
Relax in southern comfort on the east bank of the Mississippi. You're just around the corner from Beale Street and Sun Records. Watch the ducks, throw back a few and tell us what's on your mind.