You need to do the hard reset but I will not duplicate the Palm web contents on how to do that.
Let me instead share how to get Palm PDAs to do such a thing so you can avoid getting them into such a snit.
Here's how I can screw up a Palm PDA.
1. Hotsync the first PDA. Write down the name you hotsync with.
2. Hotsync the second PDA and use the name from the first PDA for what to hotsync with.
If you are unlucky to have just the right pair of PDAs you'll lock up or cause the second or first or both PDAs to lockup, or reboot in loops.
Nothing is truly broken here and I will not write why this is so.
BOTTOMLINE: Don't do that unless you are willing to research hard resets and clearing the PDA on Palm.com
I recently recieved a Palm m515 and m130 and tungsten E to go with my NR70v and lifedrive(and I just bought an E2 also, Hehe). All work but the m515 goes into a reset loop when I try to start it, it just flashs the Palm powered logo until it dies, is it reparable or is it Shot, I want tohave a working one of these, some people said it's that battery has lost all charge and can't be recharged. Thanks for the help, not to good with fixing older PDAs