IBM x3755 Installation Guide - Page 61

Power problems

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Power problems v Follow the suggested actions in the order in which they are listed in the Action column until the problem is solved. v See the parts listing in the Problem Determination and Service Guide to determine which components are customer replaceable units (CRU) and which components are field replaceable units (FRU). v If an action step is preceded by "(Trained service technician only)," that step must be performed only by a trained service technician. Symptom Action The server does not start. 1. Make sure that: Note: The power-control button v The power cords are correctly connected to the server and to a working will not function until 10 electrical outlet. seconds after the server has v The type of memory that is installed is correct. been connected to ac power. v The microprocessor/memory cards are fully seated. v The LEDs on the power supply do not indicate a problem. v The microprocessor/memory cards are installed in the correct sequence. 2. If the power-on LED does not flash: a. Disconnect the server power cords. b. Reconnect the power cords. c. Reseat the operator information panel cables, and then repeat steps 2a and 2b. v If the server starts, reseat the operator information panel. If the problem remains, replace the operator information panel. v If the server does not start, bypass the operator information panel power-control button by using the force power-on jumper; if the server starts, reseat the operator information panel. If the problem remains, replace the operator information panel. 3. Reseat the following components: a. Microprocessor/memory cards b. Power switch connector 4. Replace the following components one at a time, in the order shown, restarting the server each time: a. Microprocessor/memory cards b. Power switch connector c. (Trained service technician only) I/O 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. The server does not turn off. 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 I/O board. Chapter 6. Solving problems 49

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Power problems
v
Follow the suggested actions in the order in which they are listed in the Action column until the problem
is solved.
v
See the parts listing in the
Problem Determination and Service Guide
to determine which components are
customer replaceable units (CRU) and which components are field replaceable units (FRU).
v
If an action step is preceded by “(Trained service technician only),” that step must be performed only by a
trained service technician.
Symptom
Action
The server does not start.
Note:
The power-control button
will not function until 10
seconds after the server has
been connected to ac power.
1.
Make sure that:
v
The power cords are correctly connected to the server and to a working
electrical outlet.
v
The type of memory that is installed is correct.
v
The microprocessor/memory cards are fully seated.
v
The LEDs on the power supply do not indicate a problem.
v
The microprocessor/memory cards are installed in the correct sequence.
2.
If the power-on LED does not flash:
a.
Disconnect the server power cords.
b.
Reconnect the power cords.
c.
Reseat the operator information panel cables, and then repeat steps 2a and
2b.
v
If the server starts, reseat the operator information panel. If the problem
remains, replace the operator information panel.
v
If the server does not start, bypass the operator information panel
power-control button by using the force power-on jumper; if the server
starts, reseat the operator information panel. If the problem remains,
replace the operator information panel.
3.
Reseat the following components:
a.
Microprocessor/memory cards
b.
Power switch connector
4.
Replace the following components one at a time, in the order shown, restarting
the server each time:
a.
Microprocessor/memory cards
b.
Power switch connector
c.
(Trained service technician only) I/O 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.
The server does not turn off.
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 I/O board.
Chapter 6. Solving problems
49