the keyboard becomes erratic or fails as well. Usually, replacing the internal keyboard will fix the problem. For many notebook models, the keyboard costs $20-$30 + shipping. Usually replacing a keyboard on a notebook is fairly easy.
But first, look for a BIOS update, as this may fix the problem.
Most notebooks have between 1 and 5 screws holding the keyboard in place. Normally, the screw holes are marked in some way (like an arrow, or a keyboard icon). For the systems that I usually work on 1-2 screws is most common. The screws are on the underside of the unit.
After removing those screws there may or may not be push tabs to hold the keyboard in place. If the keyboard doesnt start falling out when the notebook is tilted, then this is likely the case. Slide these tabs to release the keyboard.
Being carful not to apply force, tilt the notebook to see if the keyboard was released or not. If it starts falling out, then you are fine. Grab it and carefully move it a little to the side. There will be between 1 and 3 connectors plugged into it, that need to be released on the MB (carefully).
If the keyboard did not fall out a little, look again for a missed screw. If you have to, remove the battery and other covers to see if a screw is under them for the keyboard. If you are certain that no screw is holding it, but it will not release, try jiggling it from side to side a little bit. There may be frame piece holding it underneath.
For me, although I have done this dozens of times or more (probably more), it usually takes around 5 min. to replace a keyboard. Sometimes, if I am unfamiliar with the model system it may take a few more minutes though.
All in all, just be careful not to damage the motherboard or pull hard while it is plugged into the MB. Or else you may have a new problem on your hands.
If you are uncertain about replacing the keyboard, take it to a professional. If it cannot be afforded, look for any service manuals for your system, or help via the manufacturer for instructions on the replacement.
