The keyboard is a fairly standardized component and not prone to many problems. Repair is not really practical, replacement is typically the best option. However, some keyboard problems can be fixed.
Symptom
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The key repeats too fast (or slow) I try to type one letter and it types several
The character repeat rate or delay is set too fast. Go to the Windows control panel and click on "Keyboard" to change the settings.
The PC beeps or gives me a "Keyboard Error" message
Turn off the PC and check that the keyboard connector is securely plugged into the back of the PC.
Make sure the keyboard is not plugged into the mouse port.
If you are using a USB keyboard, make sure USB is enabled in BIOS and in Windows.
Check that none of the keys are stuck or being held down.
The keys are sticking
Turn the keyboard upside down and shake it vigorously to dislodge any dust or debris.
Try removing the key by using a paper clip as a lever to pop it off. Check for debris or other cause of sticking, clean with a cotton swab.
With the key off, make sure any spring or mechanical parts are properly positioned to support the key.
The keyboard or keys are dirty
A damp rag can be used to wipe down the keyboard and keys.
A cotton swap moistened with rubbing alcohol can be used to get into small spaces or to scrub away grime.
