Hello together,
A few days ago I bought a HP41CV from a local garage sale in good conditions, only the battery contacts were corroded. After opening the housing for better cleaning and repairing the contacts, I saw an unknown modification and now I'm not sure, if this is an original option. Also I don't know which function does this PCB have. Maybe this is an extra memory or other functionality module?
Google doesn't help me about PCBs numbering "5081-5558" and also I cannot find any photos or articles of a similar modification. Does someone know such a modification or the function of this two extra PCBs? I will be grateful and happy for every hint.
Thanks and regards,
euleken