Thanks to all who replied to my "Waterlogged HP-67" post and offered suggestions for proceeding, as well as to the countless posters and authors of repair articles on the MoHPC. I took the "easy" way out and used Formula 409 to clean the inside of the case, the keys, and the circuit boards as well. There was no major visual damage... just some minor discoloration possibly due to the soft drink that had never been cleaned off. The battery pack had no visual corrosion or leakage and had a slight voltage charge still on it (after 13 years!) After reassembling the calc, I charged the batteries for about 4 hours and "risked" turning it on. It worked! I checked out all the keys, wrote a simple program, and the dang thing still works. HP knows how to make a Calculator, don't they?
I will have to rebuild the battery pack... it doesn't hold a charge very long. I've gotten lots of good advice off the forum and through public and private replies, and I have the NiCd batteries in-hand.
All is not completely well, however, as the card reader definitely needs repair. The reader did pull a card through, but got an Error every time. After a couple more times through the slot, the card came out "gummy" so I know the little wheel will have to be replaced.
The latest post I read suggested using silcone rubber tubing. Is this still the preferred material? Will this rubber eventually become gummy like the original? I'm not crazy about the fuel tubing that needs the stretched-in-the-oven technique. O-rings might be easy to try, also.
Again, thanks to everyone who shares their stories and methods here. This is a great forum! I would have never considered tackling my own repair in 1000 years if I hadn't stumbled upon this forum by accident (still don't remember how I got here). My stomach used to churn everytime I thought about "losing" the 67 so many years ago, and the thought of never having it work again.
Brad
P.S.... is there a "self-test" mode on the HP-67? I seem to remember there was, and I can't seem to locate the box and manual at the moment. I've exercised all the keyboard functions, shifted and non-shifted, but I would like to give it a thorough workout if that's possible.