Apple MD094LL/A 用户手册

iMac (27-inch, Mid 2010) Symptom Charts — Mass Storage 

 2010-09-09

6.  Remove hard drive and verify 

if rubber vibration isolation 

grommets are properly 

installed in hard drive bracket 

(attached to hard drive) and  

to mechanism in rear housing 

(where hard drive pins insert).

Yes

Go to step 7

No

If grommets are missing or 

damaged, replace hard drive 

bracket or mechanism as 

appropriate. Go to step 7

7.  Restart system and verify if the 

noise is still present.

Yes

Go to step 8

No

Reseating or replacing the 

drive rubber grommets /

bracket solved noise issue.

8.  Reconnect user’s drive and, 

with user’s permission, erase 

hard drive and reinstall Mac 

OS. Verify if installation process 

completes.

Yes

Go to step 9.

No

Replace hard drive. 

Go to step 10.

9.  Restart system and verify if the 

noise is still present.

Yes

Replace hard drive. 

Go to step 10.

No

Software related issue.

10. With replacement hard drive 

installed, reboot computer. 

Verify if noise is still present.

Yes

Replacement hard drive did 

not resolve issue. Go to step 

11 to check for other source 

of  noise.

No

Issue resolved by replacing 

hard drive.

11.  Disconnect hard drive SATA and 

power connections then boot 

from the Install DVD. Verify if 

noise is caused by fans.

Yes

Go to 

 symptom flow.

No

Go to step 12.

12. Disconnect hard drive and 

optical drive then boot from an 

external volume. Verify if noise 

disappears when optical drive 

has been disconnected.

Yes

Possible optical drive or 

media issue. Go to 

 symptom flow.

No

Noise issue still present, but 

does not appear to be caused 

by hard drive. Go to 

 symptom 

flow.