Apple MD094LL/A Manuale Utente

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

 2010-09-09

Unlikely cause: LCD panel, power supply, fans, speakers, camera, microphone

Optical Drive Noisy (J04)
•  Noise during boot
•  Noise during operation
•  Noise when drive is copying or 

writing data

1.  Test optical media in another computer of the 

same type to rule out media issue.

2.  Check with known-good discs like the Install DVD 

that came with the computer.

3.  Verify if noise occurs without media in optical 

drive. If so, verify if noise made by hard drive or 

fans.

4.  Refer to 

1.  Test optical drive with different 

source of media. Does the noise 

issue remain?

Yes

Go to step 2.

No

Issue due to unbalanced 

media. Recommend using 

different media.

2.  Reseat optical drive in 

enclosure. Does noise issue 

remain?

Yes

Go to step 3.

No

Issue resolved by reseating 

drive in enclosure.

3.  Install known-good optical 

drive in enclosure. Does noise 

issue remain?

Yes

Go to step 4.

No

Replace optical drive.

4.  Compare system with similar 

model for optical drive noise in 

operation and verify that noise 

level is similar.

Yes

Noise level of optical 

drive appears to be within 

specification. Return system 

to user.

No

Check for other causes of 

noise in the system.