Re: Help with this HP-12C Message #2 Posted by Vieira, Luiz C. (Brazil) on 1 Sept 2002, 11:29 p.m., in response to message #1 by jose goncalves
Oi, cara! (Hi, pal!)
It seems you have an old, good HP12C. The most recent ones have only one IC (even the mid-term ones, between the three-button cells and the single 3.3V cell). Yours is a lucky ancient.
I would solder, also, all of the IC's terminals. This procedure worked fine with one HP11C and a mid-term HP12C (the one I mentioned that has only one IC and keeps the three-button cells).
If you believe this is risky, you can try "conductive ink". As you are in São Paulo, you may find some sort of conductive ink at the dedicated electronic shops (Santa Efigênia, isn't it? I'm always confused with Rua Aurora; which of them is in São Paulo and which is in Rio de Janeiro?). If you find the ink (there are golden and silver ones, you pick), you should try "painting" each IC's terminals at the point they touch the printed circuit board. The only problem is that if it does not work, soldering them after this will "burn" the ink, leaving residual stuff that may cause future problems.
If you believe you need some more info, e-mail me. Let's talk about it.
Sucesso!
(I owe you a telephone call... Forgive-me)
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