Replacing The Motherboard; Removing The Motherboard - Sun Microsystems Ultra 20 M2 Service Manual

5.17

Replacing the Motherboard

The following sections describe how to remove and install the Sun Ultra 20 M2
Workstation system motherboard.
Note – The motherboard is not a CRU and should only be replaced by trained field
service technicians.
5.17.1

Removing the Motherboard

Perform this procedure to remove the motherboard.
1. Follow the steps in
Side Access Panel" on page
2. Gently lay the system on its right side on a stable, nonslip surface.
3. Remove any PCI or PCI-E cards installed on the motherboard (see
"Removing a PCI Card" on page
4. Remove DIMMS and CPU from the motherboard.
5. Disconnect all cables attached to the motherboard.
Section 5.2.2, "Powering Off the System and Removing the Left
5-3.
5-29).
Chapter 5 Maintaining the Workstation
Section 5.10.1,
5-53