The Sony Vaio PCG-R505EL Keyboard is an origional Sony keyboard. This is the best solution for the Sony Vaio PCG-R505EL if you have keys on the Sony Vaio PCG-R505EL Keyboard that are sticking, cracked, not working, or damaged. Most keyboards are mounted in using atleast one screw on the bottom of your system. This keyboard is specifically for the Sony Vaio PCG-R505EL laptop. The keyboard carries a 90 day warranty but is expected to last much longer. The keyboard is new or in like new condition, it is fully tested in the laptop and will perform as if it were NEW. We do not provide installation instructions for the Sony Vaio PCG-R505EL Keyboard on the Sony Vaio PCG-R505EL, but it is fairly simple. Make sure to remove the correct screw(s) on the bottom of the Sony Vaio PCG-R505EL, then the power button panel, and the rest should be fairly easy. Some keyboards lock in a little bit different than others.