메인 콘텐츠로 스킵하기

모델 A1419 / EMC 2806 / Late 2014 또는 Mid 2015. 3.3 또는 3.5 GHz Core i5 또는 4.0 GHz Core i7 (ID iMac15,1); EMC 2834 late 2015 / 3.3 또는 3.5 GHz Core i5 또는 4.0 GHz Core i7 (iMac17,1) 모두 Retina 5K 화면 장착

257 질문 전체 보기

iMac not turning on, Service LED#1 blinking

Hi,

would appreciate any comment/help about the following issue:

I got an iMac 27“, Late 2015, CTO. Display had a transport damage. Removed screen and tried to power on, service LED#1 is only blinking, if I press the power Button for a longer time, sometimes the LED will just stay on, sometimes the LED continues to blink. I can hear some strange noises from the PSU… Did anyone experience a challenge like this, should I try another PSU or could this be related to a faulty logic board? Could a faulty CPU be the reason for such a behavior?

Appreciate any support,

thanks,

marcus

Update (06/12/2019)

Hi,

just swapped the PSU against a known good one, same result, please see the video:

I guess it is Logic Board related, could this be a faulty CPU?

Service LED#1 is blinking, Service LED#2 is frequently and very briefly flashing (almost unnoticeable)

Any ideas?

Regards,

Marcus

해당 질문 답변하기 저도 같은 문제를 겪고 있습니다

좋은 질문 입니까?

점수 0
의견 추가하세요

맥북 배터리 수리 키트

기본 가격은 $69.99

Buy Now

맥북 배터리 수리 키트

기본 가격은 $69.99

Buy Now

2개의 답변

가장 유용한 답변

I would start off replacing the Power Supply. There might be more damage…

iMac Intel 27" Retina 5K Display Power Supply Replacement

해당 답변은 도움이 되었습니까?

점수 1

댓글:

The LED is telling you no power to the Logic board.

의 답변

Thank you Dan and mayer, will start with a replacement PSU and will post the results

의 답변

의견 추가하세요

I was surprised the PSU was not the fault.

Next, let’s take a look at the RAM. First we need to verify if it is the correct RAM for your machine, please pull it and tell us what you have.

해당 답변은 도움이 되었습니까?

점수 1

댓글:

Hi mayer,

the RAM is not the problem, the iMac don't even act different with or without any RAM installed, I don't even hear the sound that normally appears if RAM is missing. However, I am using CRUCIAL CT8G3S186DM.M16FP, so 2x 8 GB, which is recommended for this machine.

의 답변

의견 추가하세요

귀하의 답변을 추가하십시오

MacMarcus 가/이 대단히 고마워 할 것입니다.
조회 통계:

지난 24시간: 1

지난 7일: 3

지난 30일: 7

전체 시간: 50