|Re: damaged hp?|
Message #2 Posted by Vieira, Luiz C. (Brazil) on 30 July 2003, 3:06 p.m.,
in response to message #1 by seth hendren
you have which HP48? Or it's an HP49?
In any case, I read here that clear and neutral water is the only way. If you spilled coffe closer the the area between the display and the keyboard, it's exactly where the keyboard connects to the mainboard. Any substance that is "inserted" between both the keyboard "sheets" and the mainboard contact pads will cause problems.
As it is coffe, opening the calculator and removing the mainboard for a cleaning procedure is the most efficient way, but it is actualy the hardest. There are many procedures to open an HP48 and some of them are already described at www.hpcalc.org. I do not knwo exactly where in this site are these procedures available to download, but other contributors will help you better.
I have done it a couple of times and I succeed. In one of them the keyboard "sheet" had its trails "destroyed" by battery leakage and it was not responding to key presses anylonger. As the mainboard was fine, using a "donated" "sheet" recovered the calculator.
If you want to use water to solve the residual coffe, it's also possible and others may guide you as well. I did not try it so far, but I know it's possible and viable.
Wait for other suggestions, please.
Success! Oh, yes; and if you understand Klingon: Qapla'! (thanks, Ernie!)