Does the rest of the car work? Or is it just the screen not coming on? It might be best to just take it to the dealership.
I think the best bet is to take it to the dealer, I never want to mess around with any of the software stuff.hi i started to download a software update but jumped out the car before it had finished, now the system wont come on, the screen is just blank, i have keft it for an hour but it doesnt seem to want to come on any ideas?