7820 Corrupting programs - had to format the flash !

[Digitaldreams]

Well it lasted a few months.

I'm now finding programs reporting errors in perfect lines where no errors existed before, no the programs haven't been edited. For example....

LOCAL X1,Y1|,X2,COL,LP1,LP2;

Note the cursor where it thinks there's an error !?.

I also note the ',' key (left of the Enter key) now produces ';' !?!?!

Yes I go to edit a problem free program, exit without doing anything and "Syntax error in program line 9" !?!?!. That line is a simple data line, a program written by someone else. So every program I view is corrupted.

Any clues before trying to back up/restore my programs or reset the calc ?

Regards