HP97 memory problem

[teenix]

(05-08-2023 05:34 AM)AlexG Wrote:  Dear Tony,

it seems, I have a Problem_3 case.

As for the power supply, I use a USB unit from my iphone (2A) and put voltage directly to the contacts dedicated to the battery pack (which is removed). Could it be a source of the problem?

I guess it should be ok as long as it can maintain 5V running the calculator. I wouldn't have though it would run the printer.

It looks as though the RAM may have failed, but still puzzling that the card read works, assuming that the card program writes to step 29.

cheers

Tony