I have been using Mac systems for a while now but have never faced such problems with it before. I have a Macbook Pro which is installed with Mac OS X 10.5 on it. The problem which I am facing is whenever I put the Macbook to sleep by closing the LID or from the operating system, it does not wake up again. I cant figure out if the problem is due hardware or software and hence need your help. So if anybody knows why my MacBook Pro won't wake after sleep mode then please share some information. Thanks in advance.