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현재 버전 게시자: Sam Goldheart ,

제목:

Boot failure / Looping chime on boot? - Logic board or EFI problem?

본문:

Hi guys,

yesterday I accidentally installed the boot-loader "Clover" on the EFI partition of my MacBook Pro (Mid 2012 - A1398).

From that point on, the Macbook booted into Clover and not my normal system. I was able to choose to boot into Recovery Mode, so I had access to the hard drive again. Then I decided to rename the folder /EFI/CLOVER/ into /EFI/CLOVER-OLD in an attempt to disable Clover.

But now i have big trouble because my Macbook won't boot anymore at all. The screen stays completely black and the keyboard does not work as well. I cannot boot into Recovery Mode nor can I reset the NVRAM or SMC, etc. The keyboard simply doesn't respond. The only thing that happens is that the startup sound ("chime") is playing constantly in a loop when i turn it on :(

So its no power issue, the Macbook is still reacting to the On/Off button but boot doesn't work.

I have already removed the SSD drive, but the issue is still there regardless of the hard drive being connected or not..

I really don't know what I can do ?

I think it is the logic board, right ? Can I repair this issue by replacing the EFI BIOS Rom Chip /  EFI firmware or something like that ? Would be very grateful for your advice !

Best regards!

기기:

MacBook Pro 15" Retina Display Mid 2012

현황:

open

승인된 답변:

384420

편집 작업: Alex S. ,

제목:

Boot failure / Looping chime on boot? - Logic board or EFI problem?

본문:

Hi guys,

yesterday I accidentally installed the boot-loader "Clover" on the EFI partition of my MacBook Pro (Mid 2012 - A1398).

From that point on, the Macbook booted into Clover and not my normal system. I was able to choose to boot into Recovery Mode, so I had access to the hard drive again. Then I decided to rename the folder /EFI/CLOVER/ into /EFI/CLOVER-OLD in an attempt to disable Clover.

But now i have big trouble because my Macbook won't boot anymore at all. The screen stays completely black and the keyboard does not work as well. I cannot boot into Recovery Mode nor can I reset the NVRAM or SMC, etc. The keyboard simply doesn't respond. The only thing that happens is that the startup sound ("chime") is playing constantly in a loop when i turn it on :(

So its no power issue, the Macbook is still reacting to the On/Off button but boot doesn't work.

I have already removed the SSD drive, but the issue is still there regardless of the hard drive being connected or not..

I really don't know what I can do ?

I think it is the logic board, right ? Can I repair this issue by replacing the EFI BIOS Rom Chip /  EFI firmware or something like that ? Would be very grateful for your advice !

Best regards!

기기:

MacBook Pro 15" Retina Display Mid 2012

현황:

open

승인된 답변:

384420

원문 게시자: Alex S. ,

제목:

Boot failure / Looping chime on boot? - Logic board or EFI problem?

본문:

Hi guys,

yesterday I accidentally installed the boot-loader "Clover" on the EFI partition of my MacBook Pro (Mid 2012 - A1398).

From that point on, the Macbook booted into Clover and not my normal system. I was able to choose to boot into Recovery Mode, so I had access to the hard drive again. Then I decided to rename the folder /EFI/CLOVER/ into /EFI/CLOVER-OLD in an attempt to disable Clover.

But now i have big trouble because my Macbook won't boot anymore at all. The screen stays completely black and the keyboard does not work as well. I cannot boot into Recovery Mode nor can I reset the NVRAM or SMC, etc. The keyboard simply doesn't respond. The only thing that happens is that the startup sound ("chime") is playing constantly in a loop when i turn it on :(

So its no power issue, the Macbook is still reacting to the On/Off button but boot doesn't work.

I have already removed the SSD drive, but the issue is still there regardless of the hard drive being connected or not..

I really don't know what I can do ?

I think it is the logic board, right ? Can I repair this issue by replacing the EFI BIOS Rom Chip /  EFI firmware or something like that ? Would be very grateful for your advice !

Best regards!

기기:

MacBook Pro 15" Retina Display Mid 2012

현황:

open