Keyboard begin to beep beep after a week of use in my machine

If i plug my keyboard in my PC, after a week it begin to beep beep, if i change the keyboard for a new, this work for a week, later the same problem happen, the keyboard begin to beep beep, if i plug the keyboard in other machine, works perfectly????

Why is the problem, the keyboard chip in mainboard or what, the system is pentium 133 VX based.
greenmanAsked:
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jhanceCommented:
This problem is an indication of a faulty keyboard controller on the motherboard and not your keyboard.  The beep is not coming from the keyboard as there is no sounding device in the keyboard.  It is generated by the computer because it is interpreting faulty keypresses.  You may be able to replace the keyboard chip on the motherboard, these are pretty standard and available from most computer repair shops.  If not, you can replace the motherboard.
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