Hold the D key while booting from a powered off state with the AC adapter connected. Update your question with the results by editing your original question. You can find one using this link click on the 'Service' block: Thank you for your answer.

Getting three Beeps, Not RAM error

Your analysis seems convincing. I don't see why not? AASPs are basically just local computer shops that obtained a license through Apple to diagnose and repair Macs legally. They've been trained and are trusted by Apple from a technical standpoint but from my experiences have a more 'down to earth' vibe. You can usually speak to their technicians by request although if they're busy in that moment they may have to call you back , they don't just have a genius take your computer to a magical wizard in a back room and then return after a few minutes with it telling you that nothing is wrong.

A possibility? To use this, follow these steps: Your test results will appear in the window in the bottom-right of the console Take a note of the results Shut down your MacBook Pro Now remove one of the 2GB memory modules and repeat steps 3 - 10 Now reinsert the 2GB memory module and remove the other one and repeat steps 3 - 10 Now remove the 2GB memory module and insert the 8GB model in the first memory slot and repeat steps 3 - 10 Now remove the 8GB memory module and insert it instead into the second memory slot and repeat steps 3 - 10 Now insert one of the original 2GB memory modules into the first memory slot and repeat steps 3 - 10 Note 1: Thank you for your answer!

First, the tone is the 2nd kind: This indicates RAM does not pass a data integrity check. But the problem doesn't appear. It seems not so easily to be triggered. But as I use my Mac in my daily life, no severer impact is likely to be applied to the computer. Can you advise the exact details of your model MBP and how much RAM you had originally and how much you had after the upgrade? I will then update my answer with some other steps for you to try.

In these cases the problem all appeared. Other details: MD 13inch, mid , CPU: The problem still appears.

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  • 1 Beep, 2 Beeps, 3 Beeps…and a Logic Board! | jizurina.ml;
  • If your computer beeps and fails to boot.
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Sign up using Facebook. At any rate — I find that the iFixit site has a beautiful step-by-step guide for logic board replacement. I start detaching the cables from the Logic Board and then remove the fan.

SOLVED: Getting three Beeps, Not RAM error - MacBook Pro 15" Unibody Late - iFixit

After removing the fan, I think we have uncovered the source of the fan working overtime! The MacBook Pro boots up just fine and stays powered on without any issues for about minutes this time, but then reverts back to the original symptoms my son mentioned at the start of this journey.

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Then it dawns on me. As such, I pull the back cover off one more time, and remove both pieces of memory. I then re-insert only 1 piece of memory into the top slot of the logic board, and leave the bottom slot unoccupied. If you recently replaced or upgraded your computer's RAM, check to see if it was installed properly. If the issue continues, contact Apple Support. Three successive tones, then a five-second pause repeating: One long tone while you hold down the power button: This applies to Mac computers from before Three long tones, three short tones, three long tones: Don't disturb your Mac while the ROM recovery takes place.