Hi, I am having trouble with my TitaN Rt not switching on. I have had a dead battery pack for some time which does not matter to me as the unit is powered through the vehicle. I have a full red light on the front but no matter what I do I cant seem to get it to fire up? I have just updated the operating system today under advice from farmworks australia as I was having trouble with site mate. This was successful but since powering down the Titan I can not get it up and running again.