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Computer Keys Repair - How to Fix Keys That Aren't Responding We receive complaints from many people that a key on their keyboard isn't working. It's almost always something simple that can be fixed and can save you the expense of replacing your keyboard. First, check that the key is attached to its base. Then, make sure whether the plunger is in good condition. Repairing damaged Keys If a key is trapped in the lock there are a variety of ways to get it out. A key extractor is a common tool that can be purchased at a hardware store or online.