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Diagnostic tools 67
•
Expansion boards ("Removing a non-hot-plug expansion board" on page 28, "Removing a PCI-X
Hot Plug expansion board" on page 47)
• Processors ("Removing a processor" on page 22), except the processor installed in socket 1
IMPORTANT: Processor socket 1 and PPM slot 1 must be populated at all times or the server does not
function properly.
• PPMs ("Removing a PPM" on page 25), except the PPM installed in slot 1
• DIMMs ("Removing DIMMs" on page 59), except the first bank
• Hard drives ("Removing a hot-plug SCSI hard drive" on page 40, "Removing a hot-plug SAS
hard drive" on page 41)
• Peripheral devices
2. Install each remaining system component, rebooting between each installation to isolate any failed
components.
3. Clear the system NVRAM ("System maintenance switch" on page 77).
4. Replace the system board.
IMPORTANT: If replacing the system board or clearing NVRAM, you must re-enter the server serial number
through RBSU ("Re-entering the server serial number and product ID" on page 34).