BlownRT10

I was out of the country for a couple days and left my car sitting outside at a friends house. I get back, get in the car to come home and my navigation is telling me it needs an update but cannot download, my parking assist is inoperative and blind spot is inoperative. Its very coincidental that all of these issues started at one time while the car was sitting. no one drove it because i had my key. Took the car to the dealer, they couldn't figure it out, scanned it and nothing. The navigation did start working again but today on the way home from work, the screen went black for a minute then the same navigation message popped back up. Any ideas?