Hi, This is a duplicate of this error : https://www.dell.com/community/Alienware/17-R5-lights-and-some-keyboard-keys-not-working/td-p/7441888 But since I was not able to respond, I reposted it here. Sometimes, my F3, F12, page up are not working. I have to wait for a long time until it begins to be detected. I checked the Keyboard cable, and it is correctly inserted, so I do not know where I should look. Is there any solution to this ? The old post from @David__B never had any answers...