Q: Mac won't wake from sleep sometimes, half of RAM subsesquently disappears
I have a Mid-2009 13" MacBook Pro, and in the last few months I've been encountering this problem.
I'll close the lid on it to put it to sleep, and later when I open the lid again it won't wake. Then I close the lid again, and the "sleep" light on the front pulsates, but when I open it, the sleep light turns off like it's supposed to but still nothing happens. Close lid again, sleep light comes back, open again, light goes away, nothing happens. So, I have no choice but to turn it off (press power button for a few seconds) and turn it back on again.
However, and this is something I just recently noticed because I wondered why my computer was being so sluggish: When I turn my Mac on again after this happens, it registers 1GB of RAM rather than 2GB that are installed. I can usually get the 2GB to reappear if I attempt to reset the SMC.
What should I do about this problem? Do you think it's a problem with the RAM or the motherboard? It still has the RAM that came with it. Should I take it to the Apple Store? (Mind you, this problem doesn't happen every day.)
I'll close the lid on it to put it to sleep, and later when I open the lid again it won't wake. Then I close the lid again, and the "sleep" light on the front pulsates, but when I open it, the sleep light turns off like it's supposed to but still nothing happens. Close lid again, sleep light comes back, open again, light goes away, nothing happens. So, I have no choice but to turn it off (press power button for a few seconds) and turn it back on again.
However, and this is something I just recently noticed because I wondered why my computer was being so sluggish: When I turn my Mac on again after this happens, it registers 1GB of RAM rather than 2GB that are installed. I can usually get the 2GB to reappear if I attempt to reset the SMC.
What should I do about this problem? Do you think it's a problem with the RAM or the motherboard? It still has the RAM that came with it. Should I take it to the Apple Store? (Mind you, this problem doesn't happen every day.)
MacBook Pro 13" - Mid-2009, Mac OS X (10.6.2)
Posted on Mar 26, 2010 10:33 AM