Recently replaced unresponsive touch screen and now the buttons on the nav unit don’t work and don’t have power. Radio buttons work and light up. Removed nav unit and confirmed all cables are plugged all the way in. Unplugged battery for 10 mins and that didn’t work. Could this be a fuse issue or could this be something in the nav unit could have been damaged when I was fixing the touch screen? Any advise will be appreciated.