Yealink Phone Screens Blank

[[email protected]]

To use Microsoft terminology, after some amount of time, the screens on my Yealink T46S phones go blank. I have a custom template that has the following settings:

features.power_saving.enable = 0
​

What else am I missing to keep them from blanking out.

Edit:
Version: 15.5.9348.3
Phone Firmware: 66.82.0.20

 

[leejor]

Looks like 0, isn't the setting to use, according to this...
http://yealink38.rssing.com/browser.php?indx=49783873&item=6364

 

[craigreilly]

If I have issues like this, I setup the phone as I want it and export the config to see what the field values should be in the 3cx Template.