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Intermittent unexpected reboots
Note: Some correctable errors require that the server reboot so that it can disable a device, such as a
memory module or a processor to allow the machine to boot up properly.
1. If the reset occurs after the operating system starts, disable any automatic server restart (ASR) utilities,
such as the Automatic Server Restart IPMI Application for Windows, or any ASR devices that are
installed.
2. See the management controller event log to check for an event code that indicates a reboot. See "Event
logs" on page 205 for information about viewing the event log.
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.
Network problems
Use this information to resolve issues related to networking.
• "Cannot wake server using Wake on LAN" on page 218
• "Could not log in using LDAP account with SSL enabled" on page 218
Cannot wake server using Wake on LAN
Complete the following steps until the problem is resolved:
1. If you are using the dual-port network adapter and the server is connected to the network using Ethernet
5 connector, check the system-error log or TSM system event log, make sure:
a. Fan 3 is running in standby mode, if Emulex dual port 10GBase-T embedded adapter is installed.
b. The room temperature is not too high (see "Specifications" on page 3).
c. The air vents are not blocked.
d. The air baffle is installed securely.
2. Reseat the dual-port network adapter.
3. Turn off the server and disconnect it from the power source; then, wait 10 seconds before restarting the
server.
4. If the problem still remains, replace the dual-port network adapter.
Could not log in using LDAP account with SSL enabled
Complete the following steps until the problem is resolved:
1. Make sure that the license key is valid.
2. Generate a new license key and log in again.
Observable problems
Use this information to solve observable problems.
• "The server immediately displays the POST Event Viewer when it is turned on" on page 219
ThinkSystem SR635 Maintenance Manual
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