Apple MD094LL/A 用户手册

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

 2010-09-09

Unlikely cause: LCD panel, logic board, power supply, speakers, camera, microphone

Hard Drive Noisy
•  Noise during start up
•  Noise during operation
•  Noise when drive is copying or 

saving data

1.  Boot from Install DVD. Use Disk Utility to verify 

S.M.A.R.T. status of hard drive.

2.  Use Disk Utility to repair disk.
3.  Determine if noise is comparable to another 

machine of the same model.

4.  Refer to 

1.  Boot from the Install DVD and 

run Disk Utility. Verify if user 

hard drive is available for Disk 

Utility to repair.

Yes

Go to step 2.

No

Go to 

 symptom flow.

2.  Run Disk Utility ‘Repair Disk’ 

function and verify if it 

completes successfully.

Yes

Go to step 3.

No

Go to step 4.

3.  Restart the computer. Verify if 

the noise is still present.

Yes

Go to step 4.

No

Issue resolved. Return system 

to user.

4.  Remove glass and LCD panel, 

check that internal hard drive 

thermal sensor cable is present, 

is the correct type for the 

installed drive model, is well 

connected and retest (with an 

external display connected). 

Verify if the noise comes from 

the center fan.

Yes

Replace thermal sensor cable 

with correct part number (see 

Illustrated Views chapter to 

identify the part number, and 

Take Apart chapter for correct 

installation)

No

Go to step 5.

5.  Disconnect internal hard drive 

Sata cable and retest (with an 

external display connected). 

Verify if the noise is still present.

Yes

Noise issue still present, but 

does not appear to be caused 

by hard drive. Go to 

 symptom 

flow.

No

Go to step 6.