HP-65 Card Reader

[aj04062]

I'm restoring a pretty nice condition 65. Miraculously the gummy wheel is original and seems to pull cards great.

The card reader will engage, pull the card through then stop upon completion. The problem is: when you would expect the display to either blink because it did not read the card or come back to what was displayed before the run, it stays blank.

After running a card, the calc seems to be frozen and nothing but turning off and on again resets it.

Thoughts about what the trouble could be?

UPDATE: I think I did discover the issue. If you try to program any steps, the unit faults in the same manner as above. Blank Screen.

This would imply bad RAM, right?

[Ignazio Cara (Italy)]

Hi Adam,
IMO, yes, you have a unit with a bad RAM, and the only road to resolve the issue is another '65. Sorry but this is the sad realty.

Regards

Ignazio