Hello All, I used Software Update today on my MBP to get the new iTune for IOS5. The update included other updates for Aperture and iPhoto as well as some Firmware (did not pay attention to version numbers.) The installation appeared to go as planned, even after the initial reboot. However, at some point, the screen went completely blank and now the MBP will simply not boot at all. Here is a list of the basic facts: 1. Screen remains black at all times. 2. Keys are unresponsive (cannot eject the disk, for example) 3. On battery v. on power cord have the same results 4. Power light comes on 5. No chime at all 6. MBP gets very hot and fans kick in. 7. Running Snow Leopard 8. MBP is unibody version 9. Have tried basic boot commands, like holding C to boot from CD and resetting the VRAM. No luck Of course, I will be taking the computer in to the genius bar, but I wanted to try here first in case anyone else had this happen with the last software update since IOS5 was released. Prior to the update, the MBP had no issues at all. The web has lots of information on the previous MBP models with the Nvidia card. Mine has a Radeon card, so all of that information does not apply. Thanks for any feedback.