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macrumors newbie
Original poster
Jun 11, 2014
i have a 2010 5,1 (not upgraded 2009 4,1):
my dual cpu tray was damaged in & a replacement was sourced from ebay.
the model numbers match but the diag led for cpu b stays solid on the new tray.
i'll be replacing the backplane in case it was damaged as well when the tray was.

how can i tell if the backplane is a 2010 or 2012?
are the model numbers different at all?
does the serial number denote the difference?
i figure if i'm replacing the backplane i might as well get the newer model...


macrumors G4
Jun 13, 2016
Start reading these two posts of mine, take a look on the full threads btw:

After that, please ask what you still don't know/understand.
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