NEC Express5800/120Rh-2 N8100-1126F - Manual (Page 247)

Troubleshooting 8-11
No screen display appears with beep:
→ Check whether DIMMs are connected to the mating connectors firmly.
→ Check whether DIMMs of different specifications are installed in the specific bank.
See Chapter 9 for the specifications of DIMMs.
→ DIMMs must be populated in pairs and in the following order:
#5 and #6, #3 and #4, then #1 and #2.
→ Installed DIMMs must be the same speed and must all be registered.
→ Take a note of beep code pattern, and take appropriate action according to the table
listed earlier in "Beep Codes".
POST fails to complete:
T Is the DIMM board installed?
→ At least two DIMM boards are required for operation.
→ DIMMs must be populated in pairs and in the following order:
#5 and #6, #3 and #4, then #1 and #2.
→ Installed DIMMs must be the same speed and must all be registered.
T Is the memory size large?
→ The memory check may take a few seconds if the memory size is large. Wait for
a while.
T Did you perform any keyboard or mouse operation immediately after you started the
server?
→ If you perform any keyboard or mouse operation immediately after start-up, POST
may accidentally detect a keyboard controller error and stops proceeding. In
such a case, restart the server once again. Do not perform any keyboard or
mouse operation until the BIOS start-up message appears when you restart the
server.
T Does the server have contains appropriate memory boards or PCI devices?
→ Operation of the server with unauthorized devices is not guaranteed.