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Max Stone · 06-18-2014, 04:15 PM

Hi guys, the top row of my HP-67 is unresponsive, completely fails to register in any way. So suspecting a faulty contact I stripped the unit but I cannot trace any dry joints, bad spot welds or track breaks. The horizontal track for the top row leads through to the back of the board just above the A key, and this link is good and the IC leg it leads to is also good. I'm no electronics expert so this is about as much as I can check. The rest of the calc works perfectly...

So before I donate this unit for recycling, does any one have a suggestion on what I could be missing, or is this terminal?

Thanks in advance,

Max

HP67 · (This post was last modified: 06-18-2014 04:18 PM by HP67.)

It's absolutely useless. Send it to me immediately.

In all seriousness, I'm sure someone will be able to help you fix it.

Max Stone · 06-18-2014, 04:28 PM

mmm, may just want to hang onto this one...:-)

Back together and guess what...rolldown and x><x working with firm press. Started to 'exercise' the other keys and they are all beginning to work, so it appears to be just a case of dirt/lack of use. Just 1/x stubbornly refusing to register, so back in I go and I'll try to get under the contacts to clean.

Thanks again - hopefully all sorted on this 40 year old marvel. Like the doctor says - exercise twice a week!

HP67 · 06-18-2014, 04:38 PM

One of the best HPs ever made!

Max Stone · 06-18-2014, 06:25 PM

Card reader rebuilt and keys all working again! Wonderful machine way ahead of its time.

Mike Morrow · 06-18-2014, 08:45 PM

(06-18-2014 06:25 PM)Max Stone Wrote: Card reader rebuilt and keys all working again! Wonderful machine way ahead of its time.

Mine has been out to a list member for five years for card reader repair, along with an HP-19C. I'm hoping to get it back someday soon...real soon I hope. :-( It was my first HP, purchased for $450 in 1977.

CosmicTruth · 06-18-2014, 11:19 PM

(06-18-2014 06:25 PM)Max Stone Wrote: Card reader rebuilt and keys all working again! Wonderful machine way ahead of its time.

Built with stolen alien technology!

HP67 · 06-19-2014, 06:26 AM

(06-18-2014 08:45 PM)Mike Morrow Wrote: Mine has been out to a list member for five years for card reader repair, along with an HP-19C.

Yow! Maybe it's time to post some info on the forums so perhaps social pressure will compel him to return your belongings.

(06-18-2014 08:45 PM)Mike Morrow Wrote: It was my first HP, purchased for $450 in 1977.

I paid the same price for mine in 1981.