HP 67 slider switches and trace trouble

[jftman]

Tony,
I did the gummy wheel.
I cleaned any corrosion found.
I replaced tge positive battery terminal from a stand alone battery charger.

It always acts the same way. Turn it on and a short display of a few bits of light almost instantly disappear.

I do not have an oscilloscope and the dc power supply I use for watch repair won’t turn on, sadly. It worked when used last?

This is now over my head.
I would be willing to send this 67 to one of the members here.
Of course You, if you would look at it.

Can you connect me ?