on closing laptop i lose full screen on tv hdmi

hi sorry if this post is in the wrong place, i'm new.
i finally worked out how to get full screen on my tv when connected via hdmi from laptop, which is great. only now found that when i shut the laptop screen i lose the full screen on the tele and it sizes down to about 50% with the black boarder. on my laptop control panel "what does computer do when i shut the lid" i have selected "do nothing" on both wired and battery modes.
anyone have any suggestions as to how i can close the lid and keep full screen? thanks
(the tv is a celcus full hd smart something or other and laptop is hp running windows 8.1, if thats any help!?)
thanks again xx

Welcome to the forum kas! Do you have your setting set to maintain aspect ratio? Also with the lid closed go into the display settings and see if you can adjust it.

popeye said:

Welcome to the forum kas! Do you have your setting set to maintain aspect ratio? Also with the lid closed go into the display settings and see if you can adjust it.

Click to expand...

thanks popeye, but i dont know what aspect ratio is? :-/ and once my laptop is closed i cannot access the touch pad/keyboard to adjust anything... cuz its shut..

Um, you have no mouse? Once the lid is shut you just use the TV like your laptop screen. The good old mouse is still a necessity for some things.

I also should have said "scaling", pretty much the same as aspect ratio. This setting:

thanks, yes display scaling is on, and oh yeah i forgot about mouse's.. urm.. mice!? had a laptop for so long now and not used a mouse for years, will see if i can borrow one and see how that goes.. thanks again

kas said:

thanks, yes display scaling is on, and oh yeah i forgot about mouse's.. urm.. mice!? had a laptop for so long now and not used a mouse for years, will see if i can borrow one and see how that goes.. thanks again

Click to expand...

You're welcome. Please let us know how it goes and if you need further help.