Television and Home Theater

Do the S-Video cables really make that much of a difference?

While watching the above JVC TV, all of the sudden the screen went
black and I heard a heartbeat kind of thumping coming from the
speakers. The TV did not respond to the remote or the manual power
button. Blue power light stayed lit.

I unplugged the TV and then plugged it back in after a minute or so.
Heard the thumping again and then the blue power light started blinking
on and off. No other response.

My TV was working fine, then all of sudden I have bleeding colors. I was watching a DVD on my samsung, and it was playing great. I turned it off and went out. When I returned and turned the TV back on the colors were bleeding. My DVD player started playing in Black and White. I don't understand please help. The Tv had a great picture on it, the picture quality was beautiful.