Hi everyone. Not sure if this has been discussed before (and I'm brand new to the Mac circuit), but I've been having some issues with my Macbook. Regardless of how long it's been on, it will randomly shut down at times, fully charged, without warning. I have no idea why this is or what I could do to stop it. Also, I've been having some issues with audio CDs. It will randomly reject CDs (burned and original) without any display or message as to why given. I will hear it attempt to read it 3 times, and then ejects it. Again, no idea as to why or how to fix it. If anyone could help me out, it would be greatly appreciated.