Edge Error Message External Memory Needs Flashed??

[JD790]

A friend of mine just bought a used edge and after going through the fusion software and getting it all updated, installed it on the truck, all we get when we turn the key on is 2 messages. One says 'boot image not found' or something like that, and then the second message says 'External Memory needs to be flashed' and hangs up on that screen and then at the bottom tells us to cal edge tech support. Won't get past it no matter what we try. Anyone every heard of this before?