ALL buttons Do Not Work

ALL my buttons dont work. I bought a white casing, transferred everything from black case to white case...

At first all worked well, did not use it for about a week, today when I turned it on, only the screen works fine, all my buttons dont work.

I ran the free Desk Job game to check the buttons, a message appears on the upper left CONTROLLER REQUIRED.

OHHH i noticed just now, only the VOLUME AND POWER buttons work, nothing else.

Settings and Controller, message No Controller Detected is displayed...

I hope to know what board or part to change if any.... thanks.