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LED
Status
Description Action
Solid off
The server is running at a normal
temperature.
2 Ambient temperature
limit LED
Solid on (amber)
The ambient temperature is below
7°C (44.6°F) or over 40°C (104°F).
Check the BMC for errors and
run the diagnostic programs. See
“Using a diagnostic program” on
page 160
.
Solid off
The system fans are operating
correctly.
3 System fan error LED
Solid on (amber) One or more system fans are
running at low speed or have
been removed.
Check the BMC for errors and
run the diagnostic programs. See
“Using a diagnostic program” on
page 160
.
Note: To identify the failing
system fans, check the status
LEDs on the system board. See
“System board LEDs” on page
46
.
Solid off
The memory modules
are operating at a normal
temperature.
4 Memory module
status LED
Solid on (amber) One or more memory modules
are overheated.
Check the BMC for errors and
run the diagnostic programs. See
“Using a diagnostic program” on
page 160
.
Solid off
The microprocessors are
operating at a normal
temperature.
5 Microprocessor
status LED (also known
as CPU error LED)
Solid on (amber) One or more microprocessors are
overheated.
Check the BMC for errors and
run the diagnostic programs. See
“Using a diagnostic program” on
page 160
.
Rear view of the server
This topic provides information to help you locate the connectors and components on the rear of your server.
22 ThinkServer RD540 User Guide and Hardware Maintenance Manual