Multiple display setup

[Litinum]

I have Nvidia gpu and i want to connect my pc with tv using HDMI and use it as extended screen (as i did before), i mostly use it to watch movies so i dont using very often..so i just turn it off in nvidia control panel when i dont use it. Few days ago i turned it on and it only said "doesnt support" on tv screen..it all worked before with same setup, i tried changing resolution, changing ports in tv, updating drivers for gpu but still dont know what is the problem

 

[SgtScream]

Can you test hdmi output with another device?

 

[Litinum]

Yeah, i just checked on another tv it works no problem but i still need a way to fix the tv i want it to work on

 

[SgtScream]

Turn off your computer. Unplug your main display which I think is your monitor and just plug in the TV. When you turn on your computer does the computer output display to the TV?