Tuesday, August 10, 2010

A keyboard error

Symptom : A keyboard error is reported, but a new keyboard has no effect. If a known-good keyboard refuses to work, there are several items you can check.
  • Check the keyboard connection. Make sure that the new keyboard is installed correctly. If there is a cable connecting the keyboard panel connector to the motherboard, make sure that that wiring is attached properly.
  • Check the pico fuse. The keyboard fuse on the motherboard may have failed. Many motherboard designs incorporate a small fuse (called a picofuse) in the +5-volt dc line that drives the keyboard. If this fuse fails, the keyboard will appear dead. Replace the fuse.
  • Replace the motherboard. If problems persist, or if you cannot replace the keyboard fuse, replace the motherboard outright.

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