Turn off hdmi on the Rpi 3b+

I used to turn off the hdmi port on my old “b” to decrease the temp by 1C.

The same command does not work on the b+.

What is the command for it?

Thanks.

By turning HDMI off, did you mean to use the following command?

$ sudo /opt/vc/bin/tvservice -o

I usually use -p to turn HDMI on first, then use -o to turn it off. As I run Volumio on RPi 3B+ headless, I have not checked if HDMI displace actually is turned off. But, the command lines did not give me any error messages.

John

It works now. I must typed something else. Thx.