Re: HP-41C and lost memory Message #4 Posted by Uliboy on 29 May 2005, 11:46 a.m., in response to message #3 by Klaus
As i learned from this forum (pity, i´ve forgotten which thread, but surely around 2 years old), there are two printed circuit boards inside the hp 41 connected together wich conductive rubber (zebra-strips). The failure of early shut-down is in the contact resistance at this rubber connector. take the 41 apart and clean thoroughly the golden contacts on the pcb´s where the rubber connector is located. Use fresh isopropylic alcohol and Q-Tips (see an earlier thread of what these useful things are!)therefore. after reassembly early shutdown, as well as total power fails should be history. It´s very simple to perform and by this little surgical intervention i already cured two 41´s.
Good Luck!
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