I have a 2005 ASPEC TL an from time to time the navi screen go completely blank I can't see nothing on the navi or the other lil screen up top. I have to drive the car for atleast 20 mins then I have to cutthe engine off press the lock button an the when I restart the car the navi comes back up. Then it will work for but so long then it clips out an go back to the screen that say acura navigation. Can someone help me pls....thanks