Power Problems - Lenovo ThinkServer sd350 Installation And Service Manual

Table 12. Optional-device problems and actions (continued)
Symptom
An Lenovo optional device that
worked previously does not
work now.

Power 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.
Table 13. Power problems and actions
Symptom
The power-control 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.
Action
3. Replace the device that you just installed.
1. Make sure that all of the cable connections for the device are secure.
2. If the device comes with test instructions, use those instructions to test the
device.
3. Reseat the failing device.
4. Replace the failing device.
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 :
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.
3. Reseat the following components:
a. DIMMs
b. (Trained technician only) Power-supply cables to all internal components
c. (Trained technician only) Power switch connector
4. Replace the following components one at a time, in the order shown, restarting
the server each time:
a. DIMMs
b. Power supply
.
Chapter 3 Troubleshooting
57