That was interesting. Turn on desktop computer, during boot up it makes a beeping noise. I turn to the screen which is black with white text "Keyboard failure". I tap spacebar computer continues to load. All seems well later as I am using it, it locks up mouse won't move nothing. turn off power. Sequence as previous, wash rinse repeat. I grab spare keyboard hook it up and re-boot. Computer seems to be working now. Note to self about 10 years is all the life one can expect from a keyboard evidently.:tooth