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118 SPARC Enterprise T5120 and T5220 Servers Service Manual • July 2009
Note – The firmware configuration variable settings are not stored in the SCC
module. If you replace the motherboard, these settings will become the factory
default settings. If possible, keep a record of any firmware variables that have been
changed from the factory default values so you can configure the new motherboard
with those settings.
Related Information
■ “Remove the Motherboard Assembly” on page 118
■ “Install the Motherboard Assembly” on page 120
▼ Remove the Motherboard Assembly
Caution – This procedure requires that you handle components that are sensitive to
electrostatic discharge. This discharge can cause server components to fail.
1. Run the ALOM CMT showrc command and make a note of any SP variables
that have been modified from the factory default.
2. Stop Solaris OS to get the OpenBoot PROM prompt.
3. Run the printenv command to make a note of any OpenBoot PROM variables
that have been modified
4. Power off the server.
See “Removing Power From the System” on page 60.
5. Remove the server from the rack.
See “Remove the Server From the Rack” on page 64.
6. Attach an antistatic wrist strap.
7. Remove the top cover.
See “Remove the Top Cover” on page 67.
8. Remove the air duct.
See “Remove the Air Duct” on page 100.
9. Remove all PCIe/XAUI riser assemblies.
See “Remove a PCIe/XAUI Riser” on page 102.