Get a keyboard from a desktop and plug it into the USB port. It should auto install. If it works then I with a known good working one. This should indicate that the keyboard may have failed. Radio Shack makes a No Residue Electronics Cleaner for about $8.00, USE SPARINGLY. If that does not work, you can look on Ebay and get a replacement keyboard for less than $20.00 delivered. There are YouTube videos that show how simple it is. Ten minute job.
Answers & Comments
Get a keyboard from a desktop and plug it into the USB port. It should auto install. If it works then I with a known good working one. This should indicate that the keyboard may have failed. Radio Shack makes a No Residue Electronics Cleaner for about $8.00, USE SPARINGLY. If that does not work, you can look on Ebay and get a replacement keyboard for less than $20.00 delivered. There are YouTube videos that show how simple it is. Ten minute job.