Under Faceplate buttons will not work....

One of the tactile switches in the face plate is stuck 99% chance.

Watch this video for info, but DO NOT do any of the soldering

https://www.youtube.com/watch?v=T3hO8viI...

Open the faceplate as per video.

Keep the face plate FACE DOWN, Be careful NOT to lose the Open button and spring at the corner and DO NOT turn the face plate up or the insides will fall out.

Once the circuit board is out, turn it over, Do not touch the LED display or apply pressure to it.

Using a meter to find the offending SW(s) is easier but you can do it this way.

Put your finger nail on the switch, press it down, move to the edge of the sw till it snaps back up. Do this a couple times to each switch. Test the face plate, most likely, you have cleared up the problem. If not try again.

Be careful and ground your self from static as this board is sensitive to static and can be damaged.

After the board begins to work, put it back together again.