Hello all, I have been having some recent trouble entering sleep mode on my early 2008 Macbook Pro. It has a recent fresh installation of OS X, and I use this mac as an auxiliary mac for light duty stuff. Right after the fresh install I can't seem to get it to go into or out of sleep properly. I have shut the lid, chose sleep from the apple menu, and let it try to go to sleep on its own after a period of time. None of these work. What happens in all three of these cases is that the mac goes immediately into a black screen with the fans and the Hard Disk still running. The Sleep light on the latch button remains fully lit. It stays like this indefinitely. When I open the lid or try to wake it up with the keyboard, it simply will not respond. Just a black screen and very slight fan noise. The only way I can get it back to normal operation is to force shutdown and reboot. After that it works great... at least until I ask it to sleep again. I have tried resetting the SMC and the PRAM to no avail, and I have also re-installed several different versions of OS X to attempt to remedy the issue. Nothing seems to work. Any suggestions?