480i to 1080i need help with this?

my tv display reads 480i every time i turn it on how can i change it to 1080i? i have a 42 inch JVC lcd tv

I can change it on my samsung 19 inch tv but not on this one is there a way to do it .. i dont understand this.

Can A 19″hd-ready Lcd Tv Display At 1080i?

can my 19 inch lcd tv support 1080i its max resolution on the box says 1280×1024 but i dont know what that is it (480i,480p,720p,or 1080i)

what should i do i have my xbox 360 component hd cables plugged in.

should i buy a hdmi cable just to produce 1080p, or the 360 one, are should i just leave it how it is.

Shouldn’t a screen with resolution 1440 x 900 not be able to display resolutions of 1920 x 1080 that 1080i HD uses?