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MacBook pro three beeps on start up

Hello my Mac book pro has just started beeping three times every 5 secs and will not start up. Is this a Ram issue? Not memory has been added or taken away.



[Edited by Moderator]

Posted on May 6, 2021 6:03 AM

Reply
Question marked as Top-ranking reply

Posted on May 6, 2021 6:25 AM

Phil800w wrote:

Mac book pro three beeps on start up.




3 beeps is a RAM issue.


Try re-seating the RAM: MacBook Pro: How to remove or install memory - Apple Support https://support.apple.com/en-us/HT201165



you are testing for both bad RAM or bad bank—

one stick at a time in each bank, If the RAM sticks prove to work individual—and banks work individually.


Other known issues are: 


worn clips

or

RAM banks slightly distorted/out of flat (use shims)


You can google for more information on these faults and the work a round.


3 replies
Question marked as Top-ranking reply

May 6, 2021 6:25 AM in response to Phil800w

Phil800w wrote:

Mac book pro three beeps on start up.




3 beeps is a RAM issue.


Try re-seating the RAM: MacBook Pro: How to remove or install memory - Apple Support https://support.apple.com/en-us/HT201165



you are testing for both bad RAM or bad bank—

one stick at a time in each bank, If the RAM sticks prove to work individual—and banks work individually.


Other known issues are: 


worn clips

or

RAM banks slightly distorted/out of flat (use shims)


You can google for more information on these faults and the work a round.


MacBook pro three beeps on start up

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