OPTIMIA XM6 BUZZING?

HI MY OPTIMIA MX6 ALARM KEEPS BUZZING CAN'T GET IT TO STOP PLUS THE ALARM DOES'NT SET! I,VE TRIED TURNING POWER OFF NOTHING HAPPENS WHEN POWER BACK ON THE ALARM GOES OFF THEN I PUT IN CODE AND BUZZING COMES BACK ON WHATS THE FAULT? AND IF IT IS A MAJOR FAULT CAN I TURN THE SYTEM OFF WITH OUT TURNING OFF MY POWER SUPPLY? THANKS!