Lenovo NeXtScale nx360 M5, Installation And Service Manual, Page: 87 / 1022

• Follow the suggested actions in the order in which they are listed in the Action column until the problem is
solved.
• If an action step is preceded by “(Trained technician only),” that step must be performed only by a trained
technician.
• Go to the Lenovo support website at http://www.lenovo.com/support to check for technical information,
hints, tips, and new device drivers or to submit a request for information.
Symptom Action
2. If the problem remains or if you are using an ACPI-aware operating system,
suspect the system board.
The server unexpectedly shuts
down, and the LEDs on the
operator information panel are
not lit.
See “Solving undetermined problems” on page 77.
Serial-device problems
Use this information to solve serial-device problems.
• Follow the suggested actions in the order in which they are listed in the Action column until the problem is
solved.
• If an action step is preceded by “(Trained technician only),” that step must be performed only by a trained
technician.
• Go to the Lenovo support website at http://www.lenovo.com/support to check for technical information,
hints, tips, and new device drivers or to submit a request for information.
Symptom Action
The number of serial ports that
are identified by the operating
system is less than the number
of installed serial ports. 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.
A 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 (see “System-board
internal connectors” on page 22).
2. Reseat the following components:
a. Failing serial device
b. Serial cable
3. Replace the components listed in step 2 on page 73 one at a time, in the order
shown, restarting the server each time.
4. (Trained technician only) Replace the system board.
ServerGuide problems
Use this information to solve ServerGuide problems.
Chapter 3
.
Troubleshooting
73