Lenovo System x3550 M5, Installation And Service Manual

Page: 38 / 1144

The following illustration shows the LEDs on the rear of the server.
ac LED
(green)
dc LED
(green)
Power-supply
error LED (yellow)
00000000
00000000
00000000
0000000000
0000000000
0000000000
000000
000000
000000 0
0
0
00000
00000
00000
0
0
0
000
000
00
00
0
0
0
0
00
00
0000000
0000000
0000000
0
0
0
0
00
00
00
0
0
System-locator
LED (blue) Power LED
(green)
System-error
LED (yellow) Ethernet
activity LED Ethernet
link LED
Power
supply 2 Power
supply 1
Figure 23. LEDs on the rear
• Ethernet link LEDs: When these LEDs are lit, they indicate that there is an active link connection on the
10BASE-T, 100BASE-TX, or 1000BASE-TX interface for the Ethernet port.
• Ethernet activity LEDs: When these LEDs are lit, they indicate that the server is transmitting to or
receiving signals from the Ethernet LAN that is connected to the Ethernet port.
• Power-on LED: When this LED is lit and not flashing, it indicates that the server is turned on. The states
of the power-on LED are as follows:
Off: Power is not present, or the power supply or the LED itself has failed.
Flashing rapidly (four times per second): The server is turned off and is not ready to be turned on.
The power-control button is disabled. This lasts approximately 20 seconds.
Flashing slowly (once per second): The server is turned off and is ready to be turned on. You can
press the power-control button to turn on the server.
Lit: The server is turned on.
• System-locator LED: Use this LED to visually locate the server among other servers. You can use
Systems Director or IMM2.1 Web interface to light this LED remotely.
• System-error LED: When this LED is lit, it indicates that a system error has occurred. An LED on the
operator information panel is also lit to help isolate the error.
• dc power LED: Each hot-swap ac power supply has a dc power LED. When the dc power LED is lit, it
indicates that the power supply is supplying adequate dc power to the system. During typical operation,
both the ac and dc power LEDs are lit. For any other combination of LEDs, see “ac power-supply LEDs”
on page 60.
• ac power LED: Each hot-swap ac power supply has an ac power LED. When the ac power LED is lit, it
indicates that sufficient power is coming into the power supply through the power cord. During typical
operation, the ac power LED is lit. For any other combination of LEDs, see “ac power-supply LEDs”
on page 60.
• Power-supply error LED: When the power-supply error LED is lit, it indicates that the power supply
has failed.
Note: The power supply 1 is the default/primary power supply. If the power supply 1 fails, you must
replace the power supply immediately.
Server components
The following illustration shows the major components in the server.
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Lenovo System x3550 M5 Installation and Service Guide