Changes
The east-german CPC clone [[KC Compact]] and apparently at least [[:Image:Datamedia_sp64_2.jpg|early CPC 464s]] as well contain a more robust real keyboard circuit board, which should give it an infinite lifetime.
== Cleaning ==
Dual-foil membrane keyboards (as found in CPC 6128, CPC Plus, and 3rd generation CPC 464 keyboards) often only need to be cleaned.
== Repair ==
Broken wires are most often causing problems on single-foil keyboards (as found in CPC 664, and 2nd generation CPC 464 keyboards). There is no chance to repair broken wires on the membrane by soldering (either the wire vaporizes, or the foil melts). However, one can '''repaint''' broken wires using conductive silver, which is sold as:
* English: conductive silver (or conductive paint)
* German: Leitsilber
