修理を始めるには コミュニティ ストア

モデル番号A1311 / Mid 2011 / 2.5 & 2.7 GHz Core i5もしくは2.8 GHz Core i7プロセッサ

432回答 すべてを表示

オプション

iMac Fan is running all the time

Hello!

OK I purchased a mid 2011, 21.5, i5, 2.5ghz iMac from ebay the other day that was listed as slightly faulty. As I was looking to buy my first iMac and I had a tight budget I thought I'd give it a go. I work with computers and thought I could have a go at fixing the issues.

So this brings me to the problem, the seller said it was bought as part of an office clearance so not much history behind it and that when it was on one of the fans was noisy.

It's arrived today and true to form one of the fans is noisy. I've spent the past couple of hours researching the issue on the internet. First thing I did was run the online AHT. This brought back an error code of 4MOT/4/40000002:CPU-0. I think this refers to a faulty cpu fan but the noisy fan is coming from the right hand side of the screen?

I then downloaded smcfancontrol. Currently the ODD fan is running at 4300rpm and 46 degrees (I presume this is the noisy fan I hear). The HDD 1099rpm and 46 degrees and the CPU fan 0rpm and 46 degrees?

So I suppose my question is, where do I start to fix this? Why would a faulty cpu fan make the odd fan run at max?

Thanks in advance

この質問に回答する 同じ問題があります

この質問は役に立ちましたか？

はい いいえ
スコア 0
コメントを追加

3件の回答

フィルタ：
参考になった順 新しい順 古い順
最も参考になった回答

オプション

Check your hard drive and make sure it is an Apple branded drive, on some iMac's 2009 and above if you replace the hard drive with a non-Apple firmware model you will get this problem.

このアンサーは役に立ちましたか？

はい いいえ
スコア 1

5 件のコメント:

That's possible but I'm believe'n in the AHT error code.

さんによる

Just further to this, I don't think there is, I cannot see a temperature sensor cable attached to the hard drive either?

さんによる

New fan arrived and it hasn't resolved the issue. On closer inspection there is a scorch mark next to the fan connector. I think one of the resistors has blown but I don't know if they can be replaced?

さんによる

Can you take a hi-res picture of the area and a tighter one of the component so we can see.

さんによる

See below links to 3 pictures I have taken. I think the missing component says L5720. Would be good if someone could upload a picture of that area on a working logic board.

http://i60.tinypic.com/2sbo7s3.jpg

http://i59.tinypic.com/2zzuvfd.jpg

http://i57.tinypic.com/4liyl2.jpg

さんによる

コメントを追加

オプション

OWC In-line Digital Thermal Sensor for iMac 2011 Hard Drive Upgrade

  1. Required for any drive installed into the main drive bay.
  2. Eliminate fan noise and maintain correct system fan control when upgrading your 2011 iMac.
  3. The only iMac HDD upgrade option on the market certified to pass the Apple Hardware Test.
  4. Fixes firmware incompatibility issues with third party hard drives.
  5. https://eshop.macsales.com/item/OWC/DIDI...

このアンサーは役に立ちましたか？

はい いいえ
スコア 1
コメントを追加

オプション

To keep you from cooking the CPU. When some of the sensors or fans fail by default mode all the fans kick into high to try to keep the user from killing the CPU by continued use of a faulty machine. Try replacing the fan AHT identified (you are correct the EFI blames the CPU fan).

If this answer is acceptable please remember to return and mark it.

このアンサーは役に立ちましたか？

はい いいえ
スコア 0

3 件のコメント:

Thanks for your reply. I will order a cpu fan and see if it works. I have had time to open the iMac tonight and noticed it didn't seem to spin at all. I'm not sure though if it should spin all the time, or it only spins when it gets too hot?

さんによる

I think the fans only run in response to heat… If the GPU and HD fans are on and that one isn't I suspect it's bad. If you can remove the fan without damaging the connector you could connect it to the HD fan (one that is running) if it doesn't run then you know it's dead.

さんによる

OK, I've got the cpu fan out to test but it's connector is bigger than the other 2 fans connectors so I suppose I'll have to wait until the replacement arrives.

さんによる

コメントを追加

回答を追加する

Gareth さん、ありがとうございました！
統計データ:

過去 24時間: 1

過去 7 日: 1

過去 30 日: 7

今までの合計 2,933