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Message: <blockquote data-quote="jack963" data-source="post: 517501" data-attributes="member: 31730">Hi,I installed Leopard successfully on Friday, and since then, my computer does not wake up from sleep about 50% of the time.When I open the lid to attempt to wake it up, I hear the normal CD drive clicking sound (not the best way to describe the sound, but I don't know how else haha), but the screen just remains black. I cannot tell however, if it is a) waking up and the screen is remaining black or b) not waking up at all. The only way to remedy this is to hard to a hard shut down with the power button and then to power back on.Anybody else experience this or know what could be causing this? I never had this problem with Tiger in the 5 months that I had it on my MBP.Thanks for the help!</blockquote>