So I have two laptops, a Elitebook 8560w and an 8760w. Now it happened that some of the 8760w's keyboard keys don't work anymore, after some dissasembly. So you might say it's the ribbon cable not well connected but it is, and even checked. And hold on... that not working keyboard, connected to the 8560w works flawlessly. At the same time, 8560w's keyboard connected to the 8760w works great. But the 8760w keyboard connected to the 8760w works as described. I have no clue what's going on. It isn't working from the BIOS even, so it's not the drivers. FW updated, drivers updates, re-flashed BIOS, switched OS'es. Nothing.