Power on and power off problems
Use this information to resolve issues when powering on or powering off the server.
• “Server does not power on” on page 180
• “Server powers off unexpectedly” on page 180
• “Server does not power off” on page 180
Server does not power on
Complete the following steps until the problem is solved.
Note: The power button will not function until approximately one to three minutes after the server is
connected to ac power.
1. Remove any optional devices that were installed recently. System power problems caused by addition
of a device indicates this device is either incompatible or too much for the power supply to support.
2. Make sure the power cord is securely connected to the server and to a working electrical outlet.
Disconnect and reconnect or replace the server power cord.
3. Reseat the power supply. If the problem persists, replace the power supply.
4. Disconnect and reconnect the front panel cable (see “System-board connectors” on page 17 for the
location of the connector on the system board). If the problem persists, replace the front panel.
Server powers off unexpectedly
Complete the following steps until the problem is solved.
1. Make sure the room temperature does not cause overheating, and no object is blocking the airflow in
front and back of the server.
2. Remove any optional devices that were installed recently. System power problems caused by addition
of a device indicates this device is either incompatible or too much for the power supply to support.
3. Make sure the power cord is securely connected to the server and to a working electrical outlet.
Disconnect and reconnect or replace the server power cord.
4. Reseat the power supply. If the problem persists, replace the power supply.
Server does not power off
Complete the following steps until the problem is solved.
1. Press Ctrl+Alt+Delete.
2. Turn off the server by pressing and holding the power button for five seconds.
3. Power on the server.
4. If the server fails POST and the power button does not work, disconnect the power cord for 20 seconds;
then, reconnect the power cord and power on the server.
5. If the problem persists, contact Lenovo support.
Software problems
Use this information to solve software problems.
1. To determine whether the problem is caused by the software, make sure that:
• The server has the minimum memory that is needed to use the software. For memory requirements,
see the information that comes with the software.
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ThinkSystem ST45 V3 User Guide
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