Help with HP-67 Fault please!

[Max Stone]

mmm, may just want to hang onto this one...:-)

Back together and guess what...rolldown and x><x working with firm press. Started to 'exercise' the other keys and they are all beginning to work, so it appears to be just a case of dirt/lack of use. Just 1/x stubbornly refusing to register, so back in I go and I'll try to get under the contacts to clean.

Thanks again - hopefully all sorted on this 40 year old marvel. Like the doctor says - exercise twice a week!