Media buttons.

On the dv900t at the top, theres touch sensetive buttons that perform various media options , like mute, volume, play pause ect. Last night i was playing a game and i would randomly hear the beep noise that the computer makes when you press one of these buttons and the apllication would open or the volume get muted......today they dont even work at all. Ive noticed on anf off the buttong up top are lite up with a blue light but when im typing or playing a game they go on and off and now only half are lite up and half arent, the numlock light doesnt even light up when you press it. I reinstalled the quicklaunch buttons program that contorls them but they still dont work and the lights randomly go on and off....was kinda wondering if this is hardware related and what i can do.