ProLiant ML570 Generation 4 Server Maintenance and Service Guide

Diagnostic tools 74

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 LEDs and components" on page 86) 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:

o Expansion boards (on page 40)

o Processors ("Processor" on page 54), 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.

o PPMs ("PPM" on page 58), except the PPM installed in slot 1

o DIMMs ("Removing and installing a memory board (hot-plug)" on page 47, "Removing and

installing a memory board (non-hot-plug)" on page 50), except the first bank

o Hard drives ("Hot-plug hard drives" on page 36)

o 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.

Expansion board-related port 85 codes

Expansion board-related port 85 codes display in the format 6xh.