I have been trying to get my USB ports in the rear seating area to work along with the "cigaret lighter", and I have not been able to get them to provide any power. I have been reading post on here and they state that if the screen is on then power should be supplied to the power ports. However, this does not happen, when the screen in on there is still no power going to the power ports. Im not sure what to try from this point now.