On Sat, 27 Dec 2008, CRC wrote:
  To repair keyboards in the past I've picked up a
cheap calculator (<
 $1) at the dollar store, cut out the conductive pads from the keys,
 and pasted them in place of the hardened, non-operational pads. Works
 for me... 
I've been wondering how to deal with keys on an HP "Programmer" LCD
calculator.  I'll just get a cheap keyboard and cut out the pads.