Face does not come down and remote won't work

Suddenly, the face stopped coming down after pressing the top-left button (when face is closed). Even though, when I started up my car, it would automatically come down... just not come down by pressing the button. The first time it happened, I used the open/close button on the remote and it came down. The second time it happened, my remote did not work. In fact, none of the buttons on the remote worked, so I was stuck listening to the same station and the same volume. I ended up removing the unit to see if any connections had come loose. After making sure all connections were secure, I hooked it back up. Now, the unit will not even power on, much less flip down the face. All connections are secure and it is hooked up properly... I have no idea what could be going wrong or how to fix it, PLEASE HELP ASAP!!!