Hi, I've been trying to fix my Alienware 17 R2 for some time, just gave it a new screen and a brand new harddrive. I've been trying to boot it up with a USB that has Windows 10 on it, but I keep getting the prompt in the title: Check cable connection! PXE-MOF: Exiting PXE ROM. I just popped the thing open, and the harddrive is connected just fine inside. I'd really appreciate any help here, I just want this dang thing to work.