IBM DR550, Problem Determination And Service Manual

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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 x3650 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 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 20
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
power source.
v The type of memory that is installed is correct.
v The LEDs on the power supply do not indicate a problem.
v The microprocessors are installed in the correct sequence.
2.
Make sure that the power-control button and the reset button are working
correctly:
a. Disconnect the server power cords.
b. Reseat the operator information panel assembly cable.
c. Reconnect the power cords.
d. Press the power-control button to restart the server. If the button does not
work, replace the operator information panel assembly.
e. Press the reset button (on the light path diagnostics panel) to restart the
server. If the button does not work, replace the operator information panel
assembly.
3. 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.
4. Reseat the power backplane and restart the server.
5. Replace the power backplane and restart the server.
6. Replace the following components one at a time, in the order shown, restarting
the server each time.
a. Power supplies
b. (Trained service technician only) System board
7. If you just installed an optional device, remove it, and restart the server. If the
server now turns on, you might have installed more devices than the power
supply supports.
8. See the information about power supply LEDs in the x3650 Problem
Determination and Service Guide .
9.
See the information about power problems and resolving undetermined
problems in the x3650 Problem Determination and Service Guide .
The server does not turn off.
1.
Turn off the server by pressing the power-control button for 5 seconds.
2.
Restart the server.
3. If the server fails POST and the power-control button does not work,
disconnect the AC power cord for 20 seconds; then, reconnect the AC power
cord and restart the server.
4. If the problem remains, suspect the system board.
Chapter 5. DR550 File System Gateway (FSG)
37