MP 1,1-5,1 dual cpu tray won't recognise cpu b

[uberdown]

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...

 

[tsialex]

Start reading these two posts of mine, take a look on the full threads btw:

Identify an upgraded 4,1 easily?

Yes, but this has to be professionally made with equipment that that costs over 4 digits, to replace a TCQFP-144 with fine pitch it's not something for the usual eBay/Craigslist faker. The costs of supplies alone make this anti-economical for backplanes and single CPU trays, but can be valid for...

forums.macrumors.com

Switching CPU tray from Mac Pro 2010 to Mac Pro 2012

SMC: The best way to know if your Mac Pro is a real mid-2010/mid-2012 is checking the SMC version with >AboutThisMac>SystemReport>HardwareOverview>SMCVersion(system). If the System SMC version is 1.39f5, it's an early-2009 Mac Pro. If the System SMC version is 1.39f11, it's a real mid-2010...

forums.macrumors.com

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

 

[uberdown]

this is a huge help!!