Moved to Windows CE 2.0
My old LG Phenom H120 used to do this. Never figured out why, but the most likely cause would seem to be a faulty connection somewhere.
Casio did have a backup program for the PA-2400U, which also runs CE 2.0 on an SH3 processor. Here it is:
Attachments
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CFBKUP.EXE (40KB - 2 downloads)