alc24“ 1 I like leaving the TV on as background image and sound/I leave the TV on for background image. ”
alc24“ for the 1st would it be option 1 or 2?? ”
I think both work with no problem.
"For background" addresses the purpose for your doing it.
"As background" addresses the way you conceive/perceive its function.
The difference is miniscule. 