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

Specifications
•  Read or write speeds slower 

than expected

1.  Test optical media in another computer of the 

same type to rule out media issue.

2.  For write issues, check with known-good media 

that performs well in another computer and drive 

of the same type.

1.  Test both CD and DVD media. 

Verify if optical drive can read 

both CD and DVD media.

Yes

Go to step 5.

No

If both types of media fail, 

check that Finder Preferences 

are set to “show CD’s and 

DVD’s”, then go to step 2.

If only one type of media fails, 

drive has a laser pickup issue. 

Replace optical drive.

2.  Connect known-good optical 

drive to SATA cable. Verify if 

both CD and DVD media are 

read reliably.

Yes

SATA cable and port on logic 

board good. Go to step 4.

No

Go to step 3.

3.  Reseat SATA cable connections 

at optical drive and logic board 

(cable connects to back of logic 

board). Verify if both CD and 

DVD media are read reliably.

Yes

Go to step 5.

No

Replace SATA cable and test.

If issue persists, replace logic 

board.

Go to step 5.

4.  Connect original optical drive 

to known-good SATA cable. 

Verify if both CD and DVD 

media are read reliably.

Yes

SATA cable issue. Replace 

SATA cable. Go to step 5.

No

Replace optical drive.

5.  Test write data to compatible 

CD and DVD media. Verify if 

burned media is recognized 

and read reliably.

Yes

Issue resolved.

No

Go to step 6.