iMac LCD jumps from blue to black

Question

iMac Intel 20" EMC 2266

Model A1224 / Early 2009 / 2.66 GHz Core 2 Duo 프로세서

104 질문 전체 보기

Sam @capacitor

평판: 311

5

6

게시일: 2019년 11월 30일

옵션

iMac LCD jumps from blue to black

This beautiful Intel based iMac 20” early 2009 at startup jumps to a blue screen with a lot of visual noise (just for a second) and then turns black and stays black.

I’ve checked the screen for image with a flashlight, no signs of a faint image.

I’ve disconnected all LCD cables (except for the temperature otherwise fans go crazy), hooked up an external screen through DP and the DELL external screen shows perfectly clear image.

The diagnostic LEDs are burning as follows: 1: green 2: green 3: off 4: green.

Inverter or screen, what do you think?

EDIT: upon closer look I find that LED 3 isn’t off but is actually missing! I believe this is the GPU indicator (someone confirm?) and since external screen shows image I believe it works.

답변되었습니다! 답변 보기 저도 같은 문제를 겪고 있습니다

좋은 질문 입니까?

예 아니요

점수 0

댓글 4개

No diagnostic LED #3 Apple didn't populate it on this series.

Dan 의 2019년 11월 30일

I find it awesome that you know such a specific fact.

Sam 의 2019년 11월 30일

Using a flashlight held on the screen at a sharp angle do you see the faint image of your desktop?

Dan 의 2019년 11월 30일

Ah yes I forgot to mention in opening post. No sign of image with a flashlight either.

Sam 의 2019년 11월 30일

댓글 달기

답변 1개

선택된 답변

Dan @danj

평판: 479.4k

Self employed contract worker

35

329

971

게시일: 2019년 11월 30일

옵션

With no image that tells us the display its self has failed. On the backside under the covers is another board called a T-CON. In your case this is the part that has failed. Sadly there part is not readily available, you’ll need to replace the full display.

20” Display Assembly - Apple P/N 661-4983

해당 답변은 도움이 되었습니까?

예 아니요

점수 0

댓글 4개:

Includes the part number, that's amazing thank you.

Sam 의 2019년 11월 30일

I can get my hands on a 20" LCD from a A1224 2008. Seller can only give me panel number: M201EW02 which is similar to my 2009 LCD. Any idea if fits my early 2009 version? Can't find this info anywhere.

Sam 의 2019년 12월 1일

M201EW02 is just the panel ID vs the Apple part number which is the same!

Dan 의 2019년 12월 1일

For future reference: 2008 replacement screen fits and works 2009 model, however you need to transplant the 2009 LCD temp cable to the 2008 one as the older one has a 4 pin connector that doesn't fit the 2009 motherboard. Thanks Dan, all the best!

Sam 의 2019년 12월 3일

댓글 달기

No diagnostic LED #3 Apple didn't populate it on this series. — Dan
Using a flashlight held on the screen at a sharp angle do you see the faint image of your desktop? — Dan
Ah yes I forgot to mention in opening post. No sign of image with a flashlight either. — Sam
I can get my hands on a 20" LCD from a A1224 2008. Seller can only give me panel number: M201EW02 which is similar to my 2009 LCD. Any idea if fits my early 2009 version? Can't find this info anywhere. — Sam
M201EW02 is just the panel ID vs the Apple part number which is the same! — Dan
For future reference: 2008 replacement screen fits and works 2009 model, however you need to transplant the 2009 LCD temp cable to the 2008 one as the older one has a 4 pin connector that doesn't fit the 2009 motherboard. Thanks Dan, all the best! — Sam

iMac Intel 20" EMC 2266

iMac LCD jumps from blue to black

답변 1개

귀하의 답변을 추가하세요