Dell Latitude D530 (Early 2008) - Manual (Page 126)

126 System Setup Program
The next time you reboot the computer, the previous boot order is restored.
Changing COM Ports
Serial Port allows you to map the serial port COM address or disable the serial
port and its address, which frees computer resources for another device to use.
Enabling the Infrared Sensor
1 Press <Alt><p> until you locate Infrared Data Port under Basic Device
Configuration.
NOTE: Ensure that the COM port that you select is different from the COM port
assigned to the serial connector.
2 Press the down-arrow key to select the Infrared Data Port setting, and
press the right-arrow key to change the setting to a COM port.
3 Press <Esc> and then click Yes to save the changes and exit the system
setup program. If you are prompted to restart your computer, click Yes.
4 Follow the instructions on the screen.
5 After the infrared sensor has been enabled, click Yes to restart the
computer.
After you enable the infrared sensor, you can use it to establish a link to an
infrared device. To set up and use an infrared device, see the infrared device
documentation and access the Help and Support Center (click Start→ Help
and Support).