Q: MacBook Pro Beep SOS. Cannot start.
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Mar 28, 2016 6:24 AMby mende1,See -> About Mac computer startup tones - Apple Support
From what you say, it could either be a RAM or a EFI (firmware) one. You can repair a RAM issue by replacing the defective slot, but a damaged EFI is a much worse issue. Take the Mac to an Apple Store or reseller.
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Mar 28, 2016 8:19 AMby BobTheFisherman,Your issue is identified here: About Mac computer startup tones - Apple Support
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Mar 28, 2016 1:18 PMby perjensen,Thank you. It's up and running again, i tried to restart several times, but the error will occur again. I know the pattern.
The Apple Store solution will be a very expensive solution, so I have to see, how far I can go myself.
"3 long tones, 3 short tones, 3 long tones: Indicates EFI ROM corruption is detected and the computer is in EFI ROM recovery mode."
I have the newest EFI versions. If the EFI is corrupted, should I update the firmware (EFI and SMC) from Apple again?
How did the EFI get corrupted?
About EFI and SMC firmware updates for Intel-based Mac computers - Apple Support
MacBook Pro (13'', medio 2010) MacBookPro7,1
EFI Boot ROM-version: MBP71.0039.B0E (EFI 2.5)
SMC-version: 1.62f7 (SMC 1.6)
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Mar 28, 2016 1:59 PMby KimUserName,Hi Perjensen:
This is from the link that both Mende1 and BobTheFisherman posted.
It says that newer computers automatically recover from a corrupted ROM.
Make a Genius Bar appointment: Genius Bar
The evaluation will be FREE.
Kim
