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C  HOME††††MAC DESKTOP PARTS††††iMac Parts††††iMac - Logic Boards††††21.5" iMac - Logic Boards
iMac 21.5-inch (Mid 2011) - 2.8GHz Logic Board
Apple Part No:  661-5937 Sku No:  LOGIC-57713-R
Item Description:
This is a genuine Apple replacement Logic Board. The 2.8GHz CPU and Radeon HD 6770M graphics card are not included. The original CPU, and other removable components (memory modules, video card etc) must be removed from the old Logic Board and installed in the new one.
iMac 21.5-inch (Mid 2011) - 2.8GHz Logic Board
Sample: 21.5-inch iMac Logic Board
Condition:  Refurbished Grade 'A': An item that has been professionally cleaned and repaired. Guaranteed to be fully functional: restored to original operating specifications. May show signs of normal 'wear and tear' (minor cosmetic damage that has no impact on the part's functionality).
Warranty:  90 Days
Price :  
Identifying Numbers:
  EMC No
EMC 2428
  Model No
  Model ID
  Order No
  Printed on the Part
DKG2 , DM67 , DNJL

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Mac Serial Number:
You will find your Mac's serial number by selecting About This Mac from the Apple menubar.

If you have a non-working Mac you'll find the serial number printed on the case:

MacBook/Pro/Air; Mac Minis - bottom case by the regulatory markings.
iMac (all models) - underneath the stand.
Mac Pro family - back of the case (2006-2012 models); bottom of the case (2013 models).
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