Invalid Card Data startup error on HP48G

[sharklodon]

Hi,
On my HP48G (not GX), message "Invalid Card Data" is Displayed when the Calculator is Turned On.
I tried to fix it with PINIT command, but it doesn't happens, and message is displayed again.

Any way to fix it?

Thanks,
Shark

[rprosperi]

Sorry, original reply was about using cards, it seems your quite clear 'not a GX' comment was not clear enough the first time through.

I think Mark's comments are the most likely cause.

[mfleming]

Any chance your 48g was modified to expand the main memory? I vaguely remember instructions to replace the main RAM chip or add another, hence the 48 may think it has a memory expansion card. Check using the MEM command.

A hard reset may also recover, but you'd lose what you have in memory.

[Allen]

What do you see when you run the self test described in appendix A of the manual?