I just got a used 10B with a faulty ON/C/OFF button.
When I press it, nothing happens Though, all the other buttons work just fine.
However, if I take the batteries out, make contact with the (+) and (-) terminals for a bit, put the batteries back in, and press the ON button - the calc fires up.
But... the button won't work after this unless I take the batteries out again and do everything all over again.
Any ideas?
It's just a 10B and I may take it apart to study it anyway.
Thanks...