HP41CX: cannot activate time

[isanchez]

Hi,

I have repaired an Hp41CX,. The problems were, as always, the full set: the bottom left post, the zebra, battery contacts flex and the back cover screws areas. I have repaired both with 3D parts by thecalculatorstore.

Also green oxide in many tracks of the central area of the back side of the keyboard. It is obvious it suffered battery leakage and this affected the bottom area of the batteries.

Externally looks new. Internally is clean and with these parts replaced (bottom left post, zebra, & back cover screws).

The thing is that it works fine. All keys, all functions...everything except the Time activation (shift+on)...it always turns it off. Always. It never shown the time functions, not ebven a flick.

I have confirmed the board is a CX (cat+2: shows the time module functions list+the extended+etc). The board is absolutely pristine, no oxide at all.


Don't know what happens. I'm totally lost with this...maybe you can give me a clue.

Thanks you all.

Regards

Ignacio