HP 41 Repair for inexperienced owner

[mfleming]

(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!