Apple MD094LL/A Benutzerhandbuch

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

 2010-09-09

1.  Verify if media is free to spin 

without optical drive scraping 

edge or surface of media.

Yes

Go to step 3.

No

Go to step 2

2.  Reseat optical drive in 

enclosure and verify that a 

media can be inserted without 

being scratched

Yes

Go to step 3

No

Replace optical drive and 

retest.

3.  Test both CD and DVD media. 

Verify if drive can read both CD 

and DVD media.

Yes

Go to step 7.

No

If both types of media fail, 

check that Finder Preferences 

are set to “show CD’s and 

DVD’s”, then go to step 4.

If only one type of media fails, 

drive has a laser pickup issue. 

Replace optical drive.

4.  Install known-good optical 

drive and verify if both CD and 

DVD media are read reliably.

Yes

Both SATA cable and port on 

logic board appear good. Go 

to step 6.

No

Go to step 5.

5.  Continue to use known-good 

optical drive. Reseat optical 

drive SATA+Power cable 

connection at logic board ends 

(cable connects to back of logic 

board). Verify if both CD and 

DVD media are read reliably.

Yes

Go to step 6.

No

Replace SATA cable and retest.

If issue persists, replace logic 

board.

Go to step 7.

6.  Reinstall user’s optical drive 

and verify if both CD and DVD 

media are read reliably.

Yes

Go to step 7.

No

Replace user’s optical drive.

7.  Test write data to compatible 

CD and DVD media. Verify if 

burned media is recognized 

and read reliably.

Yes

Issue resolved.

No

Run ODD sensor and ODD fan 

tests in ASD:

If errors found check 

ODD sensor and ODD fan 

connections to logic board 

(read/write errors may be due 

to drive getting too hot).

If no errors are found 

while running latest Apple 

diagnostics, replace optical 

drive.