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現在のバージョン作成者: The Judge ,

タイトル:

Won't boot afther upgrade to macOS Sierra

テキスト:

Hello I have a problem with my Imac 21,5" A1418 EMC 2544

I have upgraded From El Capitain to macOS Sierra.

After  second restart it went i a boot loop with grey screen and boot chime over and over again.

I have disconnected my LCD  and connected a external screen same thing .

When i boot up without internal or external screen connected no boot loop only 1 chime and then it runs high speed fan.

My question is how do i reset my NVRAM without screens and EFI password set ( I know the password set it my self ) .

Or can some one tel me what i can do about this or what part or parts i have to re-please so i have a working screen again .

With Regards

The Judge

デバイス:

iMac Intel 21.5" EMC 2544

ステータス:

open

承認された回答:

354908

編集者: The Judge ,

タイトル:

Won't boot afther upgrade to macOS Sierra

テキスト:

Hello I have a problem with my Imac 21,5" A1418 EMC 2544

I have upgraded From El Capitain to macOS Sierra.

After  second restart it went i a boot loop with grey screen and boot chime over and over again.

I have disconnected my LCD  and connected a external screen same thing .

When i boot up without internal or external screen connected no boot loop only 1 chime and then it runs high speed fan.

My question is how do i reset my NVRAM without screens and EFI password set ( I know the password set it my self ) .

Or can some one tel me what i can do about this or what part or parts i have to re-please so i have a working screen again .

With Regards

The Judge

デバイス:

iMac Intel 21.5" EMC 2544

ステータス:

open

承認された回答:

354989

編集者: The Judge ,

タイトル:

Won't boot afther upgrade to macOS Sierra

テキスト:

Hello I have a problem with my Imac 21,5" A1418 EMC 2544

I have upgraded From El Capitain to macOS Sierra.

After  second restart it went i a boot loop with grey screen and boot chime over and over again.

I have disconnected my LCD  and connected a external screen same thing .

When i boot up without internal or external screen connected no boot loop only 1 chime and then it runs high speed fan.

My question is how do i reset my NVRAM without screens and EFI password set ( I know the password set it my self ) .

Or can some one tel me what i can do about this or what part or parts i have to re-please so i have a working screen again .

With Regards

The Judge

デバイス:

iMac Intel 21.5" EMC 2544

ステータス:

open

承認された回答:

354989

編集者: The Judge ,

タイトル:

Won't boot afther upgrade to macOS Sierra

テキスト:

Hello I have a problem with my Imac 21,5" A1418 EMC 2544

I have upgraded From El Capitain to macOS Sierra.

After  second restart it went i a boot loop with grey screen and boot chime over and over again.

I have disconnected my LCD  and connected a external screen same thing .

When i boot up without internal or external screen connected no boot loop only 1 chime and then it runs high speed fan.

My question is how do i reset my NVRAM without screens and EFI password set ( I know the password set it my self ) .

Or can some one tel me what i can do about this or what part or parts i have to re-please so i have a working screen again .

With Regards

The Judge

デバイス:

iMac Intel 21.5" EMC 2544

ステータス:

open

承認された回答:

354908

編集者: The Judge ,

タイトル:

Won't boot afther upgrade to macOS Sierra

テキスト:

Hello I have a problem with my Imac 21,5" A1418 EMC 2544

I have upgraded From El Capitain to macOS Sierra.

After  second restart it went i a boot loop with grey screen and boot chime over and over again.

I have disconnected my LCD  and connected a external screen same thing .

When i boot up without internal or external screen connected no boot loop only 1 chime and then it runs high speed fan.

My question is how do i reset my NVRAM without screens and EFI password set ( I know the password set it my self ) .

Or can some one tel me what i can do about this or what part or parts i have to re-please so i have a working screen again .

With Regards

The Judge

デバイス:

iMac Intel 21.5" EMC 2544

ステータス:

open

承認された回答:

354908

オリジナル投稿者: The Judge ,

タイトル:

Won't boot afther upgrade to macOS Sierra

テキスト:

Hello I have a problem with my Imac 21,5" A1418 EMC 2544

I have upgraded From El Capitain to macOS Sierra.

After  second restart it went i a boot loop with grey screen and boot chime over and over again.

I have disconnected my LCD  and connected a external screen same thing .

When i boot up without internal or external screen connected no boot loop only 1 chime and then it runs high speed fan.

My question is how do i reset my NVRAM without screens and EFI password set ( I know the password set it my self ) .

Or can some one tel me what i can do about this or what part or parts i have to re-please so i have a working screen again .

With Regards

The Judge

デバイス:

iMac Intel 21.5" EMC 2544

ステータス:

open