2. Make sure that the monitor is working properly by testing it on another server.
3. Test the console breakout cable on a working server to ensure that it is operating properly. Replace the
console breakout cable if it is defective.
Keyboard problems:
Make sure that all cables and the console breakout cable are properly connected and secure.
Mouse problems:
Make sure that all cables and the console breakout cable are properly connected and secure.
Intermittent unexpected reboots
Note: Some correctable errors require that the server reboot so that it can disable a device, such as a
memory DIMM or a processor to allow the machine to boot up properly.
1. If the reset occurs during POST and the POST watchdog timer is enabled, make sure that sufficient time
is allowed in the watchdog timeout value (POST Watchdog Timer).
To check the POST watchdog time, restart the server and press F1 to display the Lenovo XClarity
Provisioning Manager V3 system setup interface. Then, click BMC Settings ➙ POST Watchdog Timer.
2. If the reset occurs after the operating system starts, enter the operating system when the system
operates normally and set up operating system kernel dump process (Windows and Linux base
operating systems will be using different method). Enter the UEFI setup menus and disable the feature,
or disable it with the following OneCli command.
OneCli.exe config set SystemRecovery.RebootSystemOnNMI Disable --bmcxcc_userid PASSW0RD@xcc_ipaddress
3. See the management controller event log to check for an event code that indicates a reboot. See “Event
logs” on page 331 for information about viewing the event log. If you are using Linux base operating
system, then capture all logs back to Lenovo support for further investigation.
Power problems
Use this information to resolve issues related to power.
System error LED is on and event log "Power supply has lost input" is displayed
To resolve the problem, ensure that:
1. The power supply is properly connected to a power cord.
2. The power cord is connected to a properly grounded electrical outlet for the server.
3. Make sure that the power supply AC source is stable within the supported range.
4. Swap the power supply to see if the issue follows the power supply, if it follows the power supply, then
replace the failing one.
5. Review the event log and see how the problem it is to follow the event log actions to resolved the
problems.
Network problems
Use this information to resolve issues related to networking.
• “Cannot wake server using Wake on LAN” on page 359
• “Could not log in using LDAP account with SSL enabled” on page 359
358
ThinkSystem SR670 V2 Maintenance Manual
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