Ouuuucchhh, I clicked to update my early 2008 Penryn MBPro. After the update was done installing, computer was being restarted but hang during the shutoff phase. I gave it 5 min and then pressed power button. Now when I press the power button screen doesnt come on and no sounds either. Black screen but the fans are audible and slowly spin down and then nothing happens. Any ideas? I also booked a genius appointment in my local store for tomorrow, should I replace my ssd drive that i installed myself (its been working fine for half a year) to the original one, or they dont care as long as the system was working?