On an LCD TV, what's the difference between the HDMI input and the three chord inputs (red, green and blue)?

I have an XBox 360 that came with the HD Chords that have the different colors (regular ones are yellow red and white) rather than the one input chord that goes right into the HDMI pluggin on the back of the TV. The box that it came in says something like "HD component cables" but when I switch the input to the HD setting on the tv itself it says no signal so it's not going through my HD signal on the TV but rather the matching colors (I think the colors are red, green and blue) but the box says those should be HD also. So what's the difference between the two chords and where they go in the tv itself? I do notice a difference when I use the red green and blue chords verses the red white and yellow ones, but I just want to know what the difference is and why it's not showing up on my HD tv setting? Sorry this is so long, any help?

On an LCD TV, what's the difference between the HDMI input and the three chord inputs (red, green and blue)?
The red/green/blue cables are Component input, and they are HD. Make sure the switch on the part of the cable that plugs into your Xbox is set to HD and then go the Xbox "System" blade and adjust your settings to atleast 720p resolution. You will then be playing in HD.





Your TV manufacturer labels the inputs and so they may not have labeled it "HD" even though it is (your TV settings may even have options for you to relabel the inputs).





The difference between HDMI, Component (Red/Green/Blue), and Composite (Yellow, Red, White) is that HDMI is a digital HD signal which is slightly sharper or higher quality than the analog HD signal of Component. And Composite cables are not HD (maximum resolution is 480i)