Lenovo ThinkSystem SR850, Maintenance Manual

Page: 164 / 184

Unexpected shutdown with LED not lit
Complete the following steps until the problem is resolved:
1. Check the XCC event log, and resolve related errors if found any.
2. Reseat power supply.
3. If the error recurs, replace power supply.
Processor problems
Use this information to solve problems related to a monitor or video.
• “The server goes directly to the POST event viewer when it is turned on.” on page 156
The server goes directly to the POST event viewer when it is turned on.
1. Check the light path diagnostics LEDs and the XCC event log, and resolve any errors that have
occurred.
2. Make sure that the server supports all the processors and that the processors match in speed and
cache size. You can view processor details from system setup. To determine if the processor is
supported for the server, see http://www.lenovo.com/serverproven/
3. (Trained technician only) Make sure that processor 1 is seated correctly
4. (Trained technician only) Remove processor 2 and restart the server. (3 and 4)
5. Replace the following components one at a time, in the order shown, restarting the server each time:
a. (Trained technician only) Processor
b. (Trained technician only) System board
Serial-device problems
Use this information to solve problems with serial ports or devices.
• “Number of displayed serial ports is less than the number of installed serial ports” on page 156
• “Serial device does not work” on page 156
Number of displayed serial ports is less than the number of installed serial ports
Complete the following steps until the problem is solved.
1. Make sure that:
• Each port is assigned a unique address in the Setup utility and none of the serial ports is disabled.
• The serial-port adapter (if one is present) is seated correctly
2. Reseat the serial port adapter.
3. Replace the serial port adapter.
Serial device does not work
1. Make sure that:
• The device is compatible with the server.
• The serial port is enabled and is assigned a unique address.
• The device is connected to the correct connector.
2. Reseat the following components::
a. Failing serial device.
156
ThinkSystem SR850 Maintenance Manual