If you do not have an HDMI monitor connected to your Pi-Star, This command will turn Off HDMI. If you turn Off HDMI, the Raspberry pi will draw less current and therefore will run cooler.
Enter the SSH from the Config – Expert page
Simply type the following command at the Linux prompt and press enter to turn Off HDMI.
/opt/vc/bin/tvservice -o
If you need to turn HDMI back on, then simply type the following command at the Linux prompt and press Enter. The following command will turn On HDMI.
/opt/vc/bin/tvservice -p
After the command prompt returns you can type exit to leave the SSH session.
Courtesy of EA7KDO