Has anyone had problems with their Rear DVD not showing anything? I have a 2015 Yukon XL Denali that I custom ordered because I needed a second row bench seat. My middle row DVD player stopped working while it was still under warranty. They replaced the entire unit. One month over the part warranty (but many miles over the warranty) it has happened again and both rows won't show a picture unless you get it at a certain angle. My front player works great. It seems to be a loose wire but the dealer said they would need to replace both...at a total price is $1500. Anyone else dealt with this? I'd like to open it up myself but can't find a tear down yet.