White Macbook doesn't wake from sleep

Hey,
there are a few things that you can do to see if it helps the situation:

ranging from easiest to hardest (which is still not that hard)

- Do a PRAM reset on startup
hold down command option P and R together until you hear a 2nd chime, I usually tell people to wait until you HEAR 2 chimes, because if their macbooks were muted, then it may only chime once when you reset

-Reset the PMU.
The PMU unit is what regulates sleep, and wake up, and more than half the time resetting the PMU can solve your issue.
Take out your battery and unplug your MagSafe adapter after you shut down your Mac. Then open the lid, press and hold the power button for 10 seconds. Replace battery and/or AC and start your Macbook up

- Removing erroneous plists.
Sometimes your property lists in your macbook can be corrupted (no biggie, this isn't like the windows registry....)
go to your Macintosh HD -> Library (not the user one) -> Preferences -> System Configuration

if you don't see System Configuration, you went to the wrong Library folder

then drag the Powermanagement.plist and Autowake.plist out of that folder onto your desktop (don't worry, they will auto populate after you restart.)
make sure the files are OUT of that folder before you restart, if you already have a copy on the desktop but still have a copy in the folder, delete it from the System Config folder

Try these first and see if this helps

 

i have experienced this happening once before but when i restarted it i havent come across it since then