i cant get to my display icon in my menu,,its faded out ,,and my volume is ?

my volume is only going to 54,,and when i go to change it,,it says only in user mode. so i switch it to user mode. same thing,,,and my diaplay icon in the menu is faded out,,all other icons are visable to see...and my tv is to dark,, i tryed to defult it same thing:( i really need this fixed,,thanks,,its a olevia tv,,,,also do i have to have it on tv or can i leave it in vga mode? thanks