[GiGaBlue UHD QUAD 4K] LCD Display Settings and Dim

[CRMS]

Trying to get the small LCD display to dim after 15 seconds.
Settings are as follows:


I think with Dim brightness fully dark and 15 secs, after that time the screen should go black??

Also not sure what the options mean for Setting 2 - Show mini TV.... Tried various combos inc the basic MiniTV.

 

[abu baniaz]

Not all receivers support the mini-tv on the display. Menu file may need a tweak so option only shows if it applies.

 

[CRMS]

Not all receivers support the mini-tv on the display. Menu file may need a tweak so option only shows if it applies.

Not sure I follow. Receiver has LCD display with mini tv which displays the TV programme - clone at setting 5. Just trying to get it to dim after 15 seconds with dim level very low, so it is effectively off.