Mine just failed with a whole strip of keys that won't register. 4,5 t,r f,g v,c will not register. Customer "service" told me to ship the keyboard back (I have to buy packing materials and pay for shipping...) and they will fix it and return it. If you pay $100 for a premium tactile keyboard, you'd expect a prompt replacement, along with a prepaid shipping label. If so, you are expecting too much. Unicomp is a rip-off! They are trafficking on the IBM/Lexmark brands, and they don't deliver the quality nor the customer service. I have installed and set up more computers than I can remember, and have never seen a keyboard failure like this before. Still, Unicomp won't ship a replacement because "that's not our business model". I may just toss this piece of junk in the trash.