Keyboard
General
The keyboard is most useful part of the computer. It can not be thought the computer without the keyboard. It is used in most application as an input device. The keyboard is an integral part of the computer.
If the keyboard is not connected, it will generate an error at the start-up. So plug in the keyboard connector properly.Be sure that the pins in the connector to the computer should not bend if it is a PS/2 connector.
Troubleshooting
"Keyboard Not Found" Message appears.
The keyboard is not plugged into the computer securely. Unplug it and plug it back in and the problem should go away.
Key is Stuck.
If a key does not work or is stuck in the down position, try to remove it with a CPU "chip puller" tool. These simple "L" shaped tools are great at pulling out keys. Once the stuck key pulled out; try to stretch the spring to "reanimate" its action.
Computer isn't Taking Inputs From Keyboard.
Ensure that the keyboard is plugged into the keyboard jack and not into the mouse jack. If the keyboard was unplugged, plug it back in and reboot the computer.
If the keyboard still doesn't work on boot-up, power down the computer and try to borrow a friend�s known-good keyboard for troubleshooting. Plug the new keyboard up and boot up the computer. If the new keyboard works,the old keyboard is bad and needs to be replaced.
If the known-good keyboard doesn't work, check the BIOS to make sure it sees the keyboard. It should say, "Installed." If the BIOS recognizes the keyboard, then the problem must be in the keyboard port.
Keyboard is plugged into Mouse Port.
Many mice and keyboards today use a PS/2 connector. If the keyboard is plugged into the mouse port (or vice versa), follow the below steps.
Shut down the computer and plug the keyboard into the keyboard port. The keyboard port is usually marked with a "keyboard" symbol. Plug the mouse into the mouse port (usually marked with a mouse symbol).
Reboot the computer; the keyboard should work now. If keyboard doesn't work, check the BIOS to make sure the BIOS recognizes the keyboard.
If the BIOS recognizes the keyboard but it still doesn't work, certainly the problem with the keyboard port.