Q: Numerous amount of keys on keyboard dont work. (A1048)

On my White Keyboard (A1048) numerous amounts of keys dont work in the Windows nor Mac OSX environment. The keyboard is as clean as it can be, it looks practically new. I've posted a picture of all a keyboard test in a windows computer. The ones in the black boxes are keys not detected at all by both Mac OSX (10.5.8 - 10.10.3) and Windows 8.1.