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Try this: power it Off.
Remove the battery from the compartment.
Then try cleaning the terminals in the battery compartment, first by rubbing off with a fresh pencil eraser, then by wiping the terminals off with cotton swabs moistened in rubbing alcohol, then letting them dry off for 5+ minutes with the battery compartment door open, then try this:
Hold down the PLAY button, and turn the camera On again.
If it then comes up without any error, good! but if it has an error again soon after, e.g. after switching into Record mode, turn it Off again, wait a bit, then hold down the RECORD button and turn it On. That may clear the error altogether.
Let me know how it goes, and I will help further as needed.