Monitor problem

Hi all!!!!!!!

I now need yet more help, YAYYY

I have 3 monitors, a 19inch, a 17inch and a 22 inch TV.
I plug in the 19inch and the 17inch and set them up as dual monitor/independant display.
However then the 22 inch comes along and I switch it for the 17 inch.

It loads fine (after an hou of ranting) HOWEVER, I cant get my background to fill the screen, it is 1650x1080 res. But for whatever reason I can get my mouse and apps over the whole screen.

So wheres the problem?

And what would happen if I made the 22inch my main monitor, and kept coming up with no signal>?>? would I fail epically?

Forthermore, having restarted my PC, I have decided the 22 inch is a CPOS (certified piece of SH*T).

Should anyone think about purchasing a 22LS4D LG tv in the near future think again, because they are absolute trash!

Having spent an hour getitng it sorted, it took 1 restart and the TV went blank, it refused to even recognise a signal. Absolute BS!

So having wasted that hour now im quite tempted throw the screen somewhere.. preferably out of a window.