|Re: HP-41C: Port problems|
Message #2 Posted by Vieira, Luiz C. (Brazil) on 19 July 2002, 11:14 p.m.,
in response to message #1 by Juergen Rodenkirchen (Germany)
I still believe you have some contact problems, but with the new info, I'd check the integrity of the flex circuit itself, the one wrapped around the IO/BATT assy. It may have broken cooper trails. It is not that impossible...
Also, the contacts between the IO/BAT assy and the motherboard. If there's anything wrong in there, the modules' contacts may be fine, and the port's contacts may be not fine.
Well, you'll have other ideas, for sure. I have seen (and had my own experiences) that bad connections and bad contact are the most usual problems in HP calculators. A bit of solder and cleaning brought some fellas back to life (in this very week, I resoldered two HP12C, one HP11C, some SMD's on a mishandled HP48 and upgraded my HP42S to 32K! Busy days, when soldering is the special).
Cheers and success.