Raspberry Pi Kodi Media Server

To enable audio 

mount -o remount,rw /flash
nano /flash/config.txt

And add the lines:

hdmi_drive=2
hdmi_force_hotplug=1


Which will ensure HDMI is used even if unplugged or the TV is off when the libreelec box is turned on.

Check CPU Temp

/opt/vc/bin/vcgencmd measure_temp