기기를 수리하세요 커뮤니티 상점

Model A1224 / Mid 2007 및 Early 2008 / 2, 2.4, 또는 2.66 GHz Core 2 Duo 프로세서

548 질문 전체 보기

옵션

Is my backlight going out?

The top of my screen is noticeably dimmer now than in the past. "Easy," I thought, "it's the top backlight going out!" But now I'm not so sure. See, whenever the iMac wakes from sleep, the screen is nice and bright for about ¼ second before going back to its now-normal dim state.

Can anyone tell me what's going on? Is my backlight in fact going out, or is something else going wrong? I've checked the brightness control in Displays, and calibrated the screen, with no improvement.

답변되었습니다! 답변 보기 저도 같은 문제를 겪고 있습니다

좋은 질문 입니까?

예 아니요
점수 0
댓글 1개

Bump. Anybody? Bueller?

의

댓글 달기

답변 2개

필터:
가장 유용함 가장 최근 가장 오래된
선택된 답변

옵션

Sorry I missed this the first time :-(

Sadly your system uses CCFL's which over time do fade in brightness as they get close to burning out. Just like your office ceiling CFL's do.

While you can still get replacement CCFL's they are a bear to replace and if you're not careful easy to break as well. Here's a good guide to follow: Removing CCFL from iMac 20in LCD CCFL assembly. If you've never attempted anything this complex you might want to opt out and just replace the complete LCD unit. While more expensive it is a lot less work and risk. Here's the IFIXIT guide: iMac Intel 20" EMC 2133 and 2210 Display Panel Replacement.

iMac Intel 20" EMC 2133 and 2210 Display Panel 이미지

안내서

iMac Intel 20" EMC 2133 and 2210 Display Panel Replacement

난이도:

운영

—

5 - 20 minutes
iMac Intel 20" EMC 2133 and 2210 CCFL assembly 이미지

안내서

Removing CCFL from iMac 20in LCD CCFL assembly

난이도:

어려움

—

1 hour

해당 답변은 도움이 되었습니까?

예 아니요
점수 2

댓글 6개:

But does that explain why the screen will go back to its old brightness for a second after it wakes up?

의

Yes, just like a ceiling CFL's they react the same way.

의

CFLs slowly brighten as they warm up, not immediately dim right after they're turned on.

의

You're over thinking this ;-} When the bulbs are just about worn out they get brighter.

의

And then immediately dim? I've never seen that.

의

댓글 1개 더보기

댓글 달기

옵션

The backlight might be fine. You may need to replace the inverter. I would suggest trying a new inverter before sourcing and replacing the LCD itself. Here is a guide on how to swap it out: iMac Intel 20" EMC 2133 and 2210 Inverter Replacement

iFixit does not have any in stock at the moment, but you might be able to find one on PowerBookMedic.com, Ebay, or Amazon.

해당 답변은 도움이 되었습니까?

예 아니요
점수 0

댓글 1개:

If it was an inverter issue both CCFL's would react in the same way.

의

댓글 달기

귀하의 답변을 추가하세요

Calion 님은 대단히 고마워 할 것입니다.
조회 통계:

24 시간 전: 0

7일 전: 0

30일 전: 0

전체 시간: 353