Screen flickers and powers off,and gives 3 beeps when it's powered on

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MacBook Pro 15" Unibody Mid 2010

Released April 2010 / 2.4, 2.53 GHz Core i5 or 2.66 GHz Core i7 Processors

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Hi,

i have this used MBP which used to restart every now and then.

Got it to the apple store they replaced the Logic board, RAM and thought it fixed the issue.

When i got it back after a day it started powering off all by itself and sometimes the screen flickers.

when i try to power it back on. i hear three continuous beeps over and over.

Tried upgrading the ram thinking that the new RAM's are faulty and i just wanned a 8GB instead of 4GB. But then it was still the same.

either it gives me the beeps or there's no display. i can just see the power light in front of the Mac on.

Please help me out.

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chriswku03 @bcconnection Rep: 675 B&C Connection LLC 3 · Answer 1 · 2015-07-08T11:51:07-07:00

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Try one stick at a time. Sounds like a faulty ram slot.

You can get them to work at times by tightening the screws that hold the plastic frame for the ram slots.

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