Lenovo NeXtScale nx360 M5 Installation And Service Manual page 90

Table 13. Power problems and actions
Symptom
The power-control button does
not work, and the reset button
does not work (the server does
not start).
Note: The power-control
button will not function until
approximately 5 to 10 seconds
after the server has been
connected to power.
The server does not turn off.
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Lenovo NeXtScale nx360 M5 water-cooled technology tray Lenovo NeXtScale n1200 Enclosure Installation and Service Guide
Action
1. Make sure that the power-control button is working correctly:
a. Disconnect the server power cords.
b. Reconnect the power cords.
c. (Trained technician only) Reseat the operator information panel cable, and
then repeat steps 1a and 1b.
• (Trained technician only) If the server starts, reseat the operator
information panel. If the problem remains, replace the operator
information panel.
• If the server does not start, bypass the power-control button by using the
force power-on jumper (see "System-board switches and jumpers" on
page 25). If the server starts, reseat the operator information panel. If the
problem remains, replace the operator information panel.
2. Make sure that the reset button is working correctly:
• Disconnect the server power cord.
• Reconnect the power cord.
3. Make sure that :
a. The power cords are correctly connected to the server and to a working
electrical outlet.
b. The type of memory that is installed is correct.
c. The DIMM is fully seated.
d. The LEDs on the power supply do not indicate a problem.
e. (Trained technician only) The microprocessors are installed in the correct
sequence.
4. Reseat the following components:
a. DIMMs
b. (Trained technician only) Power-supply cables to all internal components
c. (Trained technician only) Power switch connector
5. Replace the following components one at a time, in the order shown, restarting
the server each time:
a. DIMMs
b. Power supply
c. (Trained technician only) System board
6. If you just installed an optional device, remove it, and restart the server. If the
server now starts, you might have installed more devices than the power supply
supports.
7. See "Power-supply LEDs" on page 59.
8. See "Solving undetermined problems" on page 80.
1. Determine whether you are using an Advanced Configuration and Power
Interface (ACPI) or a non-ACPI operating system. If you are using a non-ACPI
operating system, complete the following steps:
a. Press Ctrl+Alt+Delete.
b. Turn off the server by pressing the power-control button for 5 seconds.
c. Restart the server.