Hello,I am Pete, and I'll be happy to assist with your question today.
Did you make a backup of the files on the GPS before you formatted it and erased everything?
If so, you may be able to restore those files onto the device.
If you don't have a backup to recover from then the device will need to be returned to Magellan to have the software reinstalled on it to restore it to working order again.
You can arrange the RMA return at: http://www.magellangps.com/Warranty-Repairs-Returns
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