This instructable will guide you through diagnosing and possibly repairing of a USB keyboard.
In today's throw away society, we tend to run out and buy a cheap $15 keyboard to replace our previous high quality keyboard. This is fine as a temporary solution, but eventually we're going to want that quality feel and function back.
Most of the time, quality keyboards die because of abuse. Not necessarily intentional, but abuse nonetheless. A few drops of any beverage with acid it in will surely cause an eventual failure. This would include almost any juice (most are "vitamin fortified" which included citric acid) or soda.
Step 1: Supplies
We're going to need drivers for our specific keyboard. Most need only a small Phillips screwdriver. Some, such as this one, may also need a tiny Allen or Torx driver. I have a kit that has about every tiny driver one would ever need... It's handy to have.
We'll also need an Ohm Meter or Multimeter and a computer. I'm using a Mac here, but any Computer will do. We'll also need an On-Screen Keyboard for testing.
Lastly, we'll need about 6-8 inches of 30 guage insulated wire, commonly called wire-wrap wire and a conductive pen (available from Radio Shack).