HP 41 Repair for inexperienced owner

[dbhp67]

(03-05-2021 02:05 AM)mfleming Wrote:  

(03-04-2021 07:15 PM)AndiGer Wrote:  Must be a very early version CV as it has the nuts that hold the mainboard. Never saw that on a CV though.

I have a single such calc, pretty sure a CV, and it used the gold wire loop style zebra. Relaxation of the core from years of compression may have allowed one or more loops to part from their contacts causing a disconnect of power or signal. The nuts could be loosened a bit, allowed to sit overnight, then retightened after giving the CPU board a bit of a wiggle. Failing that, time to disassemble!

OK, so tomorrow I will carefully loosen the two nuts and leave it. Is there anything that you can spray on the posts to reduce the chance of damaging the post? Small amount of WD40 maybe? What happens if the post breaks. Can that be repaired / is there a spare part available? At the end of the day the calculator is not working so things can only go one way! ? I will report back!