Apple MD094LL/A Manuale Utente

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

 2010-09-09

Unlikely cause: LCD panel, logic board, optical drive, hard drive

SD Card will not insert into slot
•  SD Memory Card does not fully 

seat into slot

•  Card slot does not align with 

enclosure.

1.  The SD card must be a 32 mm by 24 mm by 2.1 

mm. You can also use thinner cards, such as Multi 

Media Cards (MMC).

2.  Clear any obstruction in SD card slot.

1.  Verify if known-good SD card 

fits in slot.

Yes

Ask user to replace defective 

or out-of-spec SD card.

No

Loosen the SD board screws, 

then insert known-good SD 

card again. Go to step 2.

2.  Verify if known-good SD card 

now fits in slot.

Yes

Tighten SD reader board 

screws. Go to step 3.

No

Replace SD reader and retest.

3.  Verify if SD card now ejects 

and inserts without issue.

Yes

Issue resolved by SD reader 

board alignment.

No

Replace SD reader board.