NEC Express5800 Series User Manual page 250

7-12 Troubleshooting
Check if the memory configuration is correct.
Check if third-party CPUs or memory (DIMM) are used.
Disks not in Duplex mode:
Unless you perform mirroring (including reconfiguration after failed disks are
replaced) in correct order, the mirror may not be (re)configured. Check if the steps
were correct.
The keyboard or mouse fails to operate:
Is the cable properly connected?
Make sure that the cable is connected to the correct connector on the rear of the
server.
Are the keyboard and mouse compliant with NEC Express5800/320Fc series?
Operation of the server with unauthorized devices is not guaranteed.
Does the server have drivers installed?
Refer to the manual that comes with your OS to check that the keyboard and
mouse drivers are installed. (These drivers are installed along with the OS.) Some
OS's allow you to change the keyboard and mouse settings. Refer to manual that
comes with your OS to check that the keyboard and mouse settings are correct.