I was working on my car, setting up my head unit and replacing my AC and navigation button lights. Everything was working fine so I had to unplug and plug back in to reassemble the interior. Now, my AC buttons work but my navigation buttons on the bottom row do not work. Also all the light bulbs have gone extremely dim at night.

Anyone know what could be the cause? I'm not sure if a connection is loose or I blew the circuit board (I feel like I didn't since AC buttons work and those green lights work).

 

Those buttons have a seperate connection on the bottom, almost directly behind the joystick on the backside of the bezel. It's a very short cable that plugs into the screen's board. You may have knocked it loose.