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Keyboard not detecting

\015 When we start my pc keboard light is glow but after that its not detect.\015\012we are not able to go in bios.\015

Answers :

Keyboards can fail; borrow one from a friend, plug it in with the power off on your system, then start the system.\015\012Even if your original had features the other does not, the basic functions should work.\015\012If the borrowed keyboard does work, new keyboards are not expensive.\015\012
\015\012If the borrowed one doesn't work, you may have a motherboard problem; the standard IC (8042) that handles the keyboard is most likely integrated into another IC that is permanently a part of the motherboard.\015\012This would necessitate the replacement of the mother board which is not an impossible task if done with some caution and understanding.
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