Hi Lolypop.
I've been struggling with this problem too. Although I backed up the device before I formatted it, I neglected (through ignorance) to back up the .System folder. Would you be able to PM me the link to your backup rar? I've spent hours and hours trying to recreate it through mucking about with the garmindevices.xml version numbers etc, but as with this original poster, the device is missing a critical file and hangs at the logo.
thanks in advance.
rosbif