Garmin GPSMAP 66i stuck on Garmin Splash screen

Hi All,

I have a Garmin GPSMAP 66i with me and it gets stuck at the first Garmin splash screen. This device was bitlocked but I have removed that and also have tried to factory reset the machine but it gets stuck at the splash screen. 

Also when I plug it into a PC, the PC doesnt pick up the device unless I hold down the up button on the device when the device is booting.

Im trying to save the $1000 paper weight from being a paper weight and get it working again.

Anyone got any ideas I can try?

Thanks