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Diagnostic tools 66
3.
Install the expansion boards one at a time, rebooting between each installation to isolate the failed
expansion board.
4. Replace the failed expansion board, if applicable.
5. Replace the PCI riser board, if applicable.
6. 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).
Memory-related port 85 codes
Memory-related port 85 codes display in the format 4xh.
IMPORTANT: Reboot the server after completing each numbered step. If the error condition continues,
proceed with the next step.
To troubleshoot memory-related error codes:
1. Check the memory LEDs ("Memory board components and LEDs" on page 70) for any identified
errors or failed DIMMs, and take corrective action.
2. Bring the server to base configuration by removing all components that are not required by the
server to complete POST. This process can include removing all:
• 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
3. Reseat the remaining memory boards, rebooting after each installation to isolate any failed memory
boards, if applicable.
4. Replace the DIMMs with a remaining bank of memory.
5. Replace the memory board, if applicable.
6. 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).
Miscellaneous port 85 codes
To troubleshoot all other port 85 codes:
IMPORTANT: Reboot the server after completing each numbered step. If the error condition continues,
proceed with the next step.
1. Bring the server to base configuration by removing all components that are not required by the
server to complete POST. This process can include removing all: