Stage Light Effect iMac 27 inch

Question

iMac Intel 27" EMC 2429

모델 A1312 / Mid 2011 / 2.7 & 3.1 GHz Core i5 or 3.4 GHz Core i7 Processor, ID iMac12,2

708 질문 전체 보기

Doctor Grafix @doctorgrafix

평판: 11

1

게시일: 2019년 9월 6일

옵션

Stage Light Effect iMac 27 inch

I have seen a lot of posts regarding the stage light effect on the MacBooks, but I have a 27 inch iMac that had the same issue for about 2 weeks. It was sporadic, as sometimes it would be there and others not. Today the screen is totally black. Is the stage light effect indicitive of what the cause of the display going black might be?

답변되었습니다! 답변 보기 저도 같은 문제를 겪고 있습니다

좋은 질문 입니까?

예 아니요

점수 0

댓글 6개

Can yo give us your exact model as the different series use different parts.

On the bottom of your stand you'll find the S/N, plug it into here EveryMac - Lookup let us know what you find.

Dan 의 2019년 9월 7일

Thanks Dan,

I will look into replacing the LED Logic Board, seems like a simple procedure if I can locate the right board.

My iMac is:

A 1312 ( 2.7 GHz - i5 )....

Everything that I could find about the stage light effect was related to the powerbooks - nothing for the iMac. Weird??

Doctor Grafix 의 2019년 9월 7일

Is this it? 27" iMac Core 2.7 GHz i5 (Mid-2011)

Dan 의 2019년 9월 7일

Yes, that’s it.

I have another question maybe you can answer... I about to buy a new iMac (the 2011 model is getting pretty tired and I bought it used and cheap anyhow).

But in order to transfer my files I need to be able to see the old iMac to set up Migration Assistant. I have an HD monitor ( TV ) that I can use. The port on the iMac is a Thunderbolt - but all I can find is a USB-C to HDMI adapter (the USB-C is the same size as the Thunderbolt port)

Do you think this will work in order to use the TV as a monitor temporarily?

Doctor Grafix 의 2019년 9월 7일

The USB-C (Thunderbolt3) is not compatible! The connector is still different than what your iMac has. You need either a miniDisplayPort or a Thunderbolt 1 or 2 adapter.

Here's one source of the needed adapter Mini DisplayPort-to-HDMI Adapter

An alternative way is not using any display! Instead re-start your system in Target Disk Mode by restarting the system and pressing the T key on your keyboard.

Reference: Mac startup key combinations

Don’t forget to score the answer and accept it.

Dan 의 2019년 9월 8일

댓글 1개 더보기

댓글 달기

답변 1개

선택된 답변

Dan @danj

평판: 478.9k

Self employed contract worker

35

329

970

게시일: 2019년 9월 7일

옵션

The stage-light effect is caused by either the LED driver failing or the cable connection to the display assembly. Rarely is it the display its self in the iMac’s. The only time I’ve seen a bad display is when someone damage it.

The more common issue is the LED driver logic is failing and as you’ve lost the backlight fully now that’s what I focus in on.

Here’s the needed part Backlight LED driver board Apple P/N 661-5980

iMac Intel 27" EMC 2429 LED Driver Board Replacement

해당 답변은 도움이 되었습니까?

예 아니요

점수 2

댓글 1개:

Thanks Dan!!

Doctor Grafix 의 2019년 9월 8일

댓글 달기

Can yo give us your exact model as the different series use different parts.

On the bottom of your stand you'll find the S/N, plug it into here EveryMac - Lookup let us know what you find. — Dan
Thanks Dan,

I will look into replacing the LED Logic Board, seems like a simple procedure if I can locate the right board.

My iMac is:

A 1312 ( 2.7 GHz - i5 )....

Everything that I could find about the stage light effect was related to the powerbooks - nothing for the iMac. Weird?? — Doctor Grafix
Yes, that’s it.

I have another question maybe you can answer... I about to buy a new iMac (the 2011 model is getting pretty tired and I bought it used and cheap anyhow).

But in order to transfer my files I need to be able to see the old iMac to set up Migration Assistant. I have an HD monitor ( TV ) that I can use. The port on the iMac is a Thunderbolt - but all I can find is a USB-C to HDMI adapter (the USB-C is the same size as the Thunderbolt port)

Do you think this will work in order to use the TV as a monitor temporarily? — Doctor Grafix
The USB-C (Thunderbolt3) is not compatible! The connector is still different than what your iMac has. You need either a miniDisplayPort or a Thunderbolt 1 or 2 adapter.

Here's one source of the needed adapter Mini DisplayPort-to-HDMI Adapter

An alternative way is not using any display! Instead re-start your system in Target Disk Mode by restarting the system and pressing the T key on your keyboard.

Reference: Mac startup key combinations

Don’t forget to score the answer and accept it. — Dan

iMac Intel 27" EMC 2429

Stage Light Effect iMac 27 inch

답변 1개

Update (09/07/2019)

귀하의 답변을 추가하세요