I have recently upgraded from Vista to Win 7 64x. I had issues with not being able to change brightness and on screen display did not function, but have figured those out by downloading the power manager drivers and then power manager itself, as well as hotkey drivers and switchable graphics drivers. Now, every time I start my T500, after the windows 7 logo and before the logon screen, it turns black as if in sleep mode. If I shut the lid and reopen it, it will usually wake up again. Then, after using the laptop if I decide to close the lid it enters sleep mode normally. But when I try to wake it up the screen stays black and I have to either hit the power button again or close and reopen the screen until it works.