So my 2005 tl aspec navi screen has not worked for eyars , radio was fine suddenly yesterday the screen came on and started loading! it did load then I put the code for the navi it looked fine , but some of the buttons like audio would not respond it lt lasted a few minutes then it went black again m now my radio wont work I tried putting the code with the radio buttons as I did many times before but nothing! any clues?