Dell OptiPlex GX280 - Manual (Page 46)

S3)
Blinking or solid amber — See " Power Problems ."
To exit from a power-saving state, press the power button or use the keyboard
or the mouse if it is configured as a wake device in the Windows Device
Manager. For more information about sleep states and exiting from a power-
saving state, see " Power Management ."
See " Diagnostic Lights " for a description of light codes that can help you
troubleshoot problems with your computer.
7 hard-drive
activity
light
The hard drive light is on when the computer reads data from or writes data to
the hard drive. The light might also be on when a device such as your CD player
is operating.
8 headphone
connector
Use the headphone connector to attach headphones and most kinds of
speakers.
Back View
1 back panel connectors Plug serial, USB, and other devices into the
appropriate connector.
2 security cable slot Use a security cable with the slot to help secure
your computer.
3 padlock ring Insert a padlock to lock the computer cover.
4 card slots Access connectors for any installed PCI and PCI
Express cards.
5 voltage selection switch (may not be
available on all computers)
See the safety instructions in the Product
Information Guide for more information.
6 power connector Insert the power cable.
1 serial
connector
Connect a serial device, such as a handheld device, to the serial port. The
default designations are COM1 for serial connector 1 and COM2 for serial
connector 2.
For more information, see "System Setup Options."