Power Problems - Lenovo ThinkServer TD200x Hardware Maintenance Manual

Power problems

• Follow the suggested actions in the order in which they are listed in the Action column until the problem is
solved.
• See Parts Listing, TD200x Machine Types 3719, 3821, 3822, and 3823 to determine which components are
customer replaceable units (CRU) and which components are field replaceable units (FRU).
• If an action step is preceded by "(Trained service technician only)," that step must be performed only by
a trained service technician.
Symptom
The power-control button does
not work (the server does not
start).
Note: The power-control
button will not function until
3 minutes after the server has
been connected to ac power.
The server does not turn off.
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 service technician only) Reseat the operator information panel
cables, and then repeat steps and . If the server starts, reseat the operator
information panel. If the problem remains, replace the operator information
panel.
2. Make sure that:
• The power cords are correctly connected to the server and to a working
electrical outlet.
• The type of memory that is installed is correct.
• The DIMM is fully seated.
• The LEDs on the power supply do not indicate a problem.
• The microprocessors are installed in the correct sequence.
3. Reseat the following components:
a. DIMMs
b. (Trained service technician only) Power switch connector
c. (Trained service technician only) Power backplane
4. Replace the following components one at a time, in the order shown, restarting
the server each time:
a. DIMMs
b. (Trained service technician only) Power switch connector
c. (Trained service technician only) Power backplane
d. (Trained service technician only) System board
5. 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.
6. See Power-supply LEDs.
7. See Solving undetermined problems.
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.
d. If the server fails POST and the power-control button does not work,
disconnect the power cord for 20 seconds; then, reconnect the power cord
and restart the server.
2. If the problem remains or if you are using an ACPI-aware operating system,
suspect the system board.
65
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Chapter 5 Diagnostics