I lost the boundary lines on that show up on the screen in reverse my back up camera. Additionally I have a new blue hour glass in the upper L/H corner. Can't figure out what the hour glass is representing and don't know what I did to lose the boundary lines. I need these as I hook up my trailer by myself all the time. Those lines are handy! Has anyone run into the same issue? I've had nothing but problem after problem with the electrical on this truck. Everything from the radio, ON Star, Climate control, the list goes on and on. I'm real close to turning it in on the lemon law! Help please!