How can I fix my Television after a car speaker was next to it?

I set my car speaker next to my televsion and now the coloring on my television is ruined.My cousin told me it was because I had my car speaker too close to it, something having to do with the magnet in the speaker.

Your cousin is correct as far as that goes. However, the damage is not permanent. All that has happened is that parts of the set have become slightly magnetized.

All modern TVs have a "degaussing" coil built in. It demagnetizes the screen on each power-on from "cold" (rapidly turning the set on and off will not work, it has to be off for about 15 minutes). It is designed to take care of small magnetic fields caused by movement through the Earth's field. However in time it will probably eliminate the discoloration.

If you are impatient, ask around your techie friends to see if one of them owns a handheld degaussing coil. If all else fails you can buy one for less than the cost of a service call. PC repair shops might have them too, as they used to be needed to degauss CRT-type PC monitors.

You absolutely do not need to replace the screen.

Yup that is why home speakers are shielded so the magnet can not cause interference or cause damage to the screen of the television. generally you can send it to the manufacturer and pay to have a new screen installed but it would be just about as much to just buy a new one.