I had an issue similar to this a while back (can't remember about the beep sound - but certain key presses wouldn't display).
I removed the keyboard - cleaned up the contacts on the ribbon cable where it attaches to the motherboard - re-installed keyboard and all was good.
I guess prior to doing this you could try a usb keyboard and see how it behaves.
I had an issue similar to this a while back (can't remember about the beep sound - but certain key presses wouldn't display).
I removed the keyboard - cleaned up the contacts on the ribbon cable where it attaches to the motherboard - re-installed keyboard and all was good.
I guess prior to doing this you could try a usb keyboard and see how it behaves.