HP-12C 1985 vintage repair

[teenix]

(08-01-2019 12:44 AM)pvanloon Wrote:  I have a HP-12C(serial #2512A03269) that I have had since 1985. It was sitting in my desk for several years, no batteries installed. Today I bought new batteries and installed them. This is what showed up in my window:

-8,8,8,8,8,P,8,A,8,8,
USER f g BEGIN GRAD D.MY C PRGM

I have attached a photo.

I am wondering if my calculator is beyond redemption. I hope it is not, as I very much appreciate it.

I have tried the clearing of memory - nothing. I even try to turn it off but it stays on with that stuff still in the window. It will shut off in time, but then when I hit the ON button I get the same stuff.

It may have suffered corrosion or other mess internally or on battery contacts.

cheers

Tony