Does using component cable help improve video quality? I have a standard definition (SD) set top box which has three jacks for its output(Red,white,yellow). I recently bought a Sony TV which has WXGA (1280x800) resolution and 5 jacks for input which has "Component IN" written near the input. I was wondering that , if I use a component cable as a replacement for my existing Red,White,Yellow cable (using the same SetTopBox), will it help to improve the picture quality. The current video quality is not too sharp and has significant motion-blur. I am asking this since the Sony installation guy told me a component cable will provide a better output keeping the same set top box.
It won't make a difference because your box is SD. No amount of signal inserted in it would make it look HD. To show HD, you need HD ready equipment.