Alasdair wrote:
I collect old calculators, digital diaries and databanks. Is there
anyone out there who can repair them. I am happy to pay the going
rate for this.

I repaired some old HP calculators once. It wasn't too difficult as it
was mostly made up of transistors, caps, transformers, buttons, hex
tubes etc. It is worth your while to learn basic repair on such old
beasty's.

Andrew