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+--- Thread: HP 65 - top row of keys not working (/thread-146423.html)
HP 65 - top row of keys not working - Frank Balzer - 01-31-2009
Just acquired a HP 65. Unfortunately the top row of keys (i.e. A - E) is not registering. All other keys are working. I opened it, but didn't find any obvious problems such as corrosion. Any ideas?
Frank.
Re: HP 65 - top row of keys not working - Ignazio Cara (Italy) - 02-01-2009
Look at the connection betwen logic PCB and Keyboard/display PCB, pin number 11 looking from the right side of the calculator up side down. Perhaps you could find some sign of corrosion or the pin could be broken.
I hope this could help you.
Regards
Ignazio
Re: HP 65 - top row of keys not working - Frank Balzer - 02-01-2009
Thanks for your suggestion. I'll try to clean it with isopropanol next week. However, optically all the pins look very nice. No corrosion, no bending, nothing.
Regards, Frank.
Re: HP 65 - top row of keys not working - Jeff O. - 02-02-2009
Individual keys that stop working can often be remedied by cleaning the contacts as described in this post. While fairly unlikley (I suppose, I am not a statistician) for five keys in the same row to suffer the same problem at the same time, it might be worth a try.