A1224 (EMC 2133) PSU

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I need to replace the PSU on the above iMac. I can see there are three part numbers for the unit, They are 614-0420, -0421 and -0426. They look similar dimensions/ connectors, but have different components.
Are they interchangeable?
Is the last one an upgrade on the previous two and therefore the best to fit?
 

Cory Cooper

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Hello and welcome.

The A1224 model number actually applies to 4 iMacs:
  • iMac (20-inch Mid 2007)
  • iMac (20-inch Early 2008)
  • iMac (20-inch, Early 2009)
  • iMac (20-inch, Mid 2009)
Which exact model is your iMac? Normally, it is best to replace with the exact part number to ensure full compatibility.

C
 
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Thanks for your reply. The model is 20 inch mid 2007.
I was wondering if the later part numbers were for upgraded PSUs and worth installing rather than renewing a failed unit
 

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