Please check the pictures and description carefully before bidding.
*Color : Black
*Condition:New Hard Drive Cable w/ IR Sensor

Compatibility:
Compatible with MacBook Pro 13" A1278（2012）
-- Compatible with MacBookPro9,2 Mid 2012: MD101LL/A (2.5 GHz Core i5)
-- Compatible with MacBookPro9,2 Mid 2012: MD102LL/A (2.9 GHz Core i7)

Identifying Numbers:
-- Apple Part #:923-0104, 923-0741
-- Printed Part #:821-1480-A, 821-2049-A, 821-2480-A

Package Include:
1 x Hard Drive Cable w/ IR Sensor

Something wrong happaned to your macbook laptop, it seems look like:
(1)froze suddenly.
(2)Internal hard drive disk not recognized, not respond any more.
(3)freezes takes long to start up.
(4)flashing folder icon on boot.
(5)got the flashing question mark folder, a sure sign of death when the computer turned back on.
(6)didn't boot up properly and the screen displayed a folder with a question mark! Restarting again did not make the folder with question mark go away.
(7)boot to a gray screen or keep freezing when it did boot.
(8)A new drive did not solve the problem.

Pls feel free to contact with us if you have any questions.