Troubleshooting Keyboard (KB) -
problems range from not working to random key
presses showing up when least expected, to locking up your computer.
Troubleshooting keyboard techniques:
KB problems can occur with one of the following
Disconnecting and reconnecting the
When you move your computer or work on it sometimes you have to disconnect the
cables, reconnecting them in a tight space could cause the small pins inside the
connector body to get bent. If you look at the pins and one is bent then you can
use a retractable ball point pen to bend them back to the original position. Or
use a pair of very thin needle nose pliers. Be careful with the amount of force
you use to grip and bend the pins with you can squash the pin (they
are hollow) or break it off.
Another problem that occurs when moving a computer is that the mouse and keyboard connectors are the same, but with different functions. Plugging the
mouse into the keyboard port or keyboard into the mouse port will cause the
keyboard and mouse to fail, it will not damage any thing, they just won't work.
Keyboards and mice are the most used and abused devices connected to your computer.
They get the most human contact. I am not saying that we are malicious, just
careless sometimes. The impact from dropping a keyboard may cause the key caps
to come louse. If it drops say three feet to carpet the force of the impact may
only loosen some key caps in this case with the power off on the computer press
firmly on the cap to reseat it... If it is a hard drop, say three feet to
concrete you may as well replace it.
Spilling liquid on
Electronic devices and liquids do not mix. Liquids spilled into a keyboard
are no exception. If you spill your Pepsi or coffee on your keyboard you will
have to replace it. The only exception is the newer sealed keyboards that have a
plastic membrane over the keys sealing them from dirt and moisture. Even water
will cause the keyboard to malfunction. The reason that water will cause the
electronics to malfunctions is there are minerals in the water, it does not take
much to cause a short in micro components.
We rarely think of dirt getting into a component when it is inside a
building. Well there is a lot of stuff floating in the air, even buildings with
air conditioning. The filters can not take everything out of the air. The
particles may be microscopic but they will build up over time. When dust settles
on your keyboard it will migrate down inside and get between the key contacts
and cause a short. You can keep this from happening by vacuuming your keyboard
occasionally. Use a full size vacuum (those little battery
powered vacuums don't have the power needed to pull the dust out of a keyboard)
and a clean paint brush. Use the paint brush to get between the key caps and
dislodge the dust, then with the vacuum head about one or two inches off the key
caps vacuum up the dust, hair, and other foreign matter
(if you put the vacuum cleaner nozzle directly over the key caps you will pull
them off of the keyboard!).
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Last point: Wireless mice and keyboards are becoming common in this wireless
age if you are experiencing intermittent connections replace the battery or
batteries. When you change them be sure to press the "reset" button on the
device or it will not connect to the transmitter/receiver connected to the USB
And if the keyboard (kb) controller fails you have to replace the motherboard
Troubleshooting Keyboard for a laptop takes a different approach.