Start by resetting your PRAM and SMC. For instructions on how to do that [http://support.apple.com/kb/ht1379|click here] and [http://support.apple.com/kb/ht3964|click here]. If that doesn't resolve your problempull your RAM out of their slots and reseat them, then do the resets again. Please let us know the results of these things.
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Start by resetting your PRAM and SMC. For instructions on how to do that [http://support.apple.com/kb/ht1379|click here] and [http://support.apple.com/kb/ht3964|click here]. If that doesn't resolve your problem, [https://www.ifixit.com/Guide/MacBook+Unibody+Model+A1342+RAM+Replacement/1666|pull your RAM out of their slots] and reseat them, then do the resets again. Please let us know the results of these things.
Start by resetting your PRAM and SMC. For instructions on how to do that [http://support.apple.com/kb/ht1379|click here] and [http://support.apple.com/kb/ht3964|click here]. If that doesn't resolve your problem pull your RAM out of their slots and reseat them, then do the resets again. Please let us know the results of these things.