Oracle Sun Server X4-4, Service Manual

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Replace the Motherboard (FRU)
222 Sun Server X4-4 Service Manual • October 2015
11.
Remove the four bus bar screws securing the motherboard to the power supply
backplane.
12. Position the cables off to the side, using the tab on the power supply cover.
The motherboard is mounted to a metal plate. The plate has eight keyed slots that align with
eight standoffs mounted to the bottom of the chassis. The standoffs lock the motherboard and
plate assembly to the chassis. To unlock the assembly, you need to slide the assembly toward
the front of the server before you can lift it out.
13.
To unlock the motherboard, use the memory riser card guide and the handle
above the SP card slot to slide the motherboard toward the front of the server.
This action unlocks the motherboard and plate assembly.
14. Lift the front end of the motherboard while gently sliding it away from the back of
the server, ensuring that the Locator indicator light pipe extension piece slides
out of its hole in the chassis back wall .