I have a 2001 Range Rover bought about three months ago from the US. The GPS just showed a white screen, I thought it needed a Canadian disc, after geting a disc I found there was allready a disc stuck in the unit which jamed on the slot when it tried to eject. Managed to get it out with a pair of tweezers. Doing that caused the radio volume control to not work. Removed the disc playing unit and now the radio is OK. are these GPS unit worth geting repaired and if so any body know where and approx how much, Also the digital display for the heater has lost half its display can these be repaired or shall I just live with it. any help would be appreaciated.