Hard ware keys stopped working help

[GodxSon]

hi,

some of the hardware keys stopped working on my htc diamond...the only keys that work are. the power button, voluime buttons, up pad down pad and the center/ok button....everything else does not work, even the touch pad doesnt work...can any one please help me, OH and the buttons somtimes work for example when i somtimes press any button on the left side it will go to the home screen, for example when i press call button it will go to the home screen, same with the right side if i press the back button it will press the call end buton wierd eh? So basicly the buttons do respon (the litghts turn on when i press any hard ware button but they do not do anythin 99% of the time and if they do it is the wron function HELP GUYS!