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13-4 SPARC Enterprise M4000/M5000 Servers Service Manual • August 2009
13.1.1 Accessing the SPARC Enterprise M4000
Motherboard Unit
Caution – There is an electrical hazard if the power cords are not disconnected. All
power cords must be disconnected to completely remove power from the server.
1. Power off the server.
This step includes turning the key switch to the Service position, confirming that
the POWER LED is off, and disconnecting power cables. See “Powering the
Server Off Using Software” on page 4-12.
Caution – To prevent the equipment rack from tipping over, you must deploy the
antitilt feature, if applicable, before you slide the server out of the equipment rack.
Note – When drawing out the SPARC Enterprise M4000/M5000 Server to the front,
release the cable tie holding the PCI cables on the rear of the server.
2. Remove the top cover.
This step includes deploying the rack’s antitilt features (if applicable), sliding the
server out of the equipment rack, and removing the top cover. See “Removing
the Top Cover” on page 5-5.
Caution – Use proper ESD grounding techniques when handling components. See
“Safety Precautions” on page 1-1.
3. Remove all CPU modules and filler panels.
See “Removing the CPU Module” on page 12-5.
Note – If the motherboard unit is only being removed to provide access to the
busbar, and the weight of the motherboard is not a problem, Step 4 can be skipped.
4. Remove all of the memory boards.
See “Removing the Memory Board” on page 11-6.
5. Loosen the two (2) captive screws that secure the cable management arm to the
left rear of the server.
6. Disconnect the cable management arm from the equipment rack.