Motherboard - Sun Microsystems Ultra 80 Service Manual

a. Align the DIMM with the memory connector, with the DIMM's double notch
nearest the memory connector ejection lever.
b. Using your thumbs, press the DIMM straight down into the connector until the
ejection lever clicks, locking the DIMM in the connector.
Note – Ensure the DIMM is properly seated; a clicking sound will be heard.
5. Replace the memory riser assembly.
See Section 9.6.2 "Replacing the Memory Riser Assembly" on page 9-22.
6. Detach the antistatic wrist strap.
7. Replace the access panel and power on the system.
See Section 6.3 "Replacing the Access Panel/Powering On the System" on page 6-6.
8. Verify proper operation.
See Section 3.5 "Maximum and Minimum Levels of POST" on page 3-6.
9.8

Motherboard

To remove and replace the motherboard, proceed as follows.
Caution – Use an antistatic mat when working with the motherboard. An antistatic
mat contains the cushioning needed to protect the underside components, to prevent
motherboard flexing, and to provide antistatic protection.
Note – If the motherboard is being replaced, remove the memory riser assembly,
UPA graphics card(s), CPU module(s), and PCI card(s) prior to removing the
motherboard. Note the chassis slot location for each UPA graphics card and PCI card
prior to removal.
Note – The NVRAM/TOD contains the system host identification (ID) and Ethernet
address. If the same ID and Ethernet address are to be used on the replacement
motherboard, remove the NVRAM/TOD from the motherboard and install the
removed NVRAM/TOD on the replacement motherboard after motherboard
installation.
-30 Sun Ultra 80 Service Manual • March 2000