Lenovo 7D7Q, Maintenance Manual

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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 159
• “Could not log in using LDAP account with SSL enabled” on page 159
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 IMM2 system event log (see “Event logs” on page 141 ),
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 1 ).
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.
• “Server hangs during the UEFI boot process” on page 160
• “The server immediately displays the POST Event Viewer when it is turned on” on page 160
• “Server is unresponsive (POST is complete and operating system is running)” on page 160
• “Server is unresponsive (POST failed and cannot start System Setup)” on page 161
• “Voltage planar fault is displayed in the event log” on page 161
• “Unusual smell” on page 161
• “Server seems to be running hot” on page 161
• “Cannot enter legacy mode after installing a new adapter” on page 162
• “Cracked parts or cracked chassis” on page 162
Chapter 5
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Problem determination
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