hi there, i have a late 2008 mbp (2.5,4gigs ram, 512vid), running the latest version of osx. I usually have my laptop in clamshell mode hooked up to an external monitor for the work day. When i'm done i unplug the monitor and take my laptop and open it and all i get is a black screen and it will not wake from sleep or whatever state it is in. i have gone to apple and they ran tests on the video card but it had no problems. sometimes this will happen when i'm just using is as a laptop, put it to sleep, and when i open it up it just wont turn on and i have to hard reboot. I read the imacs had similar issues could this be the same? I haven't seen any firmware updates for my laptop. thanks for any advice. tt.