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How to Repair Damaged Keys If you have a key or two that don't work, it can be frustrating to type. If you have a spare or compatible key it is possible to fix the problem without buying a new keyboard. Begin by examining the problem. Look for any foreign material that could be blocking the key, preventing it from working properly. Keycaps damaged If you're a fan of keyboards you're likely to have at one time or another you have required the removal of the cap on your keyboard because of damage.