Is there any way or guide or anything about how to fix the 661-4996 backplane of the 2009 Mac Pro 4.1? The question is easy as that, my mac just died, and tested all the elements on other mac pro, worked, except for the backplane, it just won't turn on, it should be easy to replace it but apple has stopped manufacturing those parts, so I need to fix it, I really don't know how, so I need help with that.
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Check the diagnostic lights
Location Name Color Status Indicates
LED 1 Yellow On Yes Power supply is
providing trickle
power
LED 2 Red Off No CPU B halts
on an IERR
(instruction
error)
LED 3 Red Off No CPU A halts
on an IERR
(instruction
error)
LED 4 Red Off No CPU B is over
temperature
LED 5 Red Off No CPU A is over
temperature
LED 6 Green On Yes EFI has configured
the graphics
card
LED 7 Power on Green On Yes All power rails
are functioning
LED 8 EFI done Green On Yes EFI is done
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The only solution is exchange the backplane, the best solution choosed is ridiculous.
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Hello. I have the same issue. What didi yoy mean change backplane ?
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