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.
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:
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 2a and
2b.
• (Trained technician only) If the server starts, replace the operator information panel.
• If the server does not start, go to step 3.
3. Make sure that both power supplies installed in the server are of the same type. Mixing different power
supplies in the server will cause a system error (the system-error LED on the front panel turns on).
4. 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 DIMMs are fully seated.
• The LEDs on the power supply do not indicate a problem.
• The processors are installed in the correct sequence.
5. Reseat the following components:
a. Operator information panel connector
b. Power supplies
6. Replace the following components. restarting the server each time:
a. Operator information panel connector
b. Power supplies
7. 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.
8. See “Power supply LEDs” on page 138.
Server does not power off
Complete the following steps until the problem is resolved:
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 and holding it down 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.
Chapter 4. Problem determination 155
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