IBM System x3400 Type 7975 Installation Manual page 52

The following illustration shows the controls, LEDs, and connectors on the front of
the simple-swap server models.
Front
information
panel
CD or DVD drive
activity LED
(green)
Power-on LED
Power-control button
Hard disk drive activity LED
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System x3400 Types 7973, 7974, 7975, and 7976: Installation Guide
System power LED
Power-control button
Hard disk drive activity LED
When this LED is lit, it indicates that the server is turned on. When this LED
is off, it indicates that ac power is not present, or the power supply or the
LED itself has failed.
Note: If this LED is off, it does not mean that there is no electrical power in
the server. The LED might be burned out. To remove all electrical
power from the server, you must disconnect the power cords from
the electrical outlets.
Press this button to turn the server on and off manually.
When this LED is flashing, it indicates that a hard disk drive is in use.
System error LED
USB connectors
CD or DVD-eject button