NEC Express5800/120Rg-1 User Manual page 210

8-14 Troubleshooting
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:
11 and 21, 31 and 41, 12 and 22, 32 and 42, 13 and 23, and 33 and 43.
→ 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:
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:
11 and 21, 31 and 41, 12 and 22, 32 and 42, 13 and 23, and 33 and 43.
→ Installed DIMMs must be the same speed and must all be registered.
Is the memory size large?
→ The memory check may take a few seconds if the memory size is large. Wait for a
while.
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.
Does the server have contains appropriate memory boards or PCI devices?
→ Operation of the server with unauthorized devices is not guaranteed.