Hi all, I have been having a problem with my laptop hibernating and sleeping. About once every five attempts, when I tell the computer to either sleep or hibernate, the screen will shut off but the computer will never completely go down. By that I mean the fans keep running, usb ports are still active, (although nothing is plugged into them) and the back-lit keyboard is still on. The only way to recover is to force shut down the computer. I have let the computer sit all night with the black screen to see if anything would happen. Ive been having this problem for a few months now. All of Microsoft's updates are installed and my Dell drivers are up to date. I am currently running Windows 7 Professional but the problem was also happening earlier when I was running Home Premium. Hardware diagnostics came up empty and Dell wont help because I upgraded my OS. My exact laptop specs are listed bellow. Dell Studio 1747 laptop. It has an i7 720 processor with 4gb of ram. It has an ATI graphics card. Thanks for all of your help!!!