Keyboard problem or mobo problem?

[Defacil]

anyone know what would cause a beep sound from the motherboard followed by the keyboard not working?

 

[BentValve]

Do you get a "no keyboard" error when it starts up?

 

[Defacil]

no, i can boot up and everything and use the keyboard. Sometimes when playing a game tho, i hear a short beep and then only the keyboard stops working.