I just recently purchased a 2006 Acura TL and the woman I got it from said that the Navigation screen was on and then it shut off and when it did that the radio also quit. I have checked the fuses in the drivers kick panel but am missing the fuse cover? I have tried to hold the 1&6 buttons while pressing the power on the radio and get nothing in the upper display that shows me a code? The A/C controls work but still nothing on the radio and a blank screen on the Navigation unit? Need to know where to start from here and if anyone has had the same issue?

 

Have you checked connections behind navi/radio?