IBM 7944, Installation And User Manual

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Fading on and off:
The server is in a reduced-power state. To wake the server, press the power-
control button or use the IMM web interface. See “Logging on to the Web interface” on page 116 for
information on logging on to the IMM web interface.
•
System-locator LED:
Use this LED to visually locate the server among other servers. You can use IBM
Systems Director to light this LED remotely.
Power-supply LEDs
Use this information to view power-supply LEDs.
The following minimum configuration is required for the server to start:
• One microprocessor in microprocessor socket 1
• One 2 GB DIMM for each microprocessor installed (one 2 GB DIMM in slot 3 if only one microprocessor
installed)
• One power supply
• Power cord
• Five cooling fans (fan 1, 2, 3, 4, and 5)
• One PCI riser-card assembly in PCI connector 2
• One ServeRAID SAS/SATA controller
AC power-supply LEDs
Use this information to view AC power-supply LEDs.
The following illustration shows the location of the AC power-supply LEDs on the rear of the server. See the
Problem Determination and Service Guide
for additional information about solving power-supply problems.
Figure 12. AC power-supply LEDs
The following table describes the problems that are indicated by various combinations of the power-supply
LEDs on an ac power supply and suggested actions to correct the detected problems.
AC power-supply LEDs
Description
Action Notes AC DC
Error (!)
On On Off Normal operation
Off Off Off No ac power to the
server or a
problem with the
ac power source.
1. Check the ac power to the
server.
2. Make sure that the power
cord is connected to a
functioning power source.
3. Restart the server. If the error
remains, check the power-
supply LEDs.
4. Replace the power-supply.
This is a normal
condition when no ac
power is present.
Chapter 1
.
The Lenovo System x3550 M3 server
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