If you are seeing a message which says 'Dev.Auto Power Off (Press Any Key to Cancel)', this may be related to the TV's power settings.
Open up the menu and head to Setup on the right. The relevant option is under Time Settings > Sleep Timer and Auto Sleep.
If your Foxtel-connected TV is displaying this message but continues to turn off after a button is pressed, then this is likely due to your Foxtel box's energy saving settings.
To ensure that your TV does not turn off in this circumstance, you will need to stop your Foxtel from going into Auto Standby by changing the Energy Saving Level to 'Off'.
You can do this by following the steps applicable to your Foxtel model here: http://www.foxtel.com.au/got/support/tv/how-to-use/foxtel-remote/auto-standby.html
If you have any questions about this setting, you can contact Foxtel directly for further information.
If changing your Foxtel Energy Saving Level to 'Off' does not resolve the issue, please feel free to contact our support team.