Google got me this in about 3 clicks...
"Accomplish a hard reset by holding the power button while pushing the reset button, and continue holding the power button until the initial Palm OS flash screen comes up. The device will then ask you if you really want to do a hard reset. If so, push page up. Pushing anything else will perform a soft reset. A hard reset will erase all your data and third-party applications from RAM. It returns your device RAM to factory conditions, just as if you pulled it from its sealed box. The initial welcome screen will come up and require you to calibrate the digitizer and check the system time and date. It will also restore things like the factory MIDI sounds, factory demos, etc. This is a drastic step, and should only be taken if nothing else worked to recover your device to your control."
http://www.tankerbob.com/palm/resets.htm
see if it works
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