computer keeps beeping on startup

my macbook pro beeps three times on start up what does that mean

MacBook Pro, OS X Mountain Lion (10.8.4)

Posted on Sep 23, 2013 9:41 PM

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Level 10

362,017 points

Sep 23, 2013 9:44 PM in response to gregcheslik05

Usually defective memory.

Intel-based Mac Power On Self Test RAM error beeps

Power On Self-Test Beep Definition - Part 2

Mac computers- About startup tones

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Sep 23, 2013 9:44 PM in response to gregcheslik05

Not enough working RAM memory to start up.

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computer keeps beeping on startup

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