The screen is very fuzzy not clear

backlight inverter or tcon board

It is most important when inquiring on this site to please include a model number and make of the product that you are asking about.
There are so many thousand of TV types out there that a general question like your just can not be answered without more information from you.

Try going into set up menu and look for a screen degauzing function or try setting the screen temp. to warmer or cooler.

check the cable line on the back of you tv

When you say its hard to read are you meaning its sort of 3-D looking or is it like a glowing that makes it fuzzy only in certain areas. Let me know and I will assist you with the issue.

Is the picture fuzzy whether you are waching tv or a dvd or a tape. If it's only fuzzy on tv or dvd or tape then it's the source. If all inputs are fuzzy suspect a bad tv.

Sounds like your coolant in the tubes need to be repalced. This is a common problem as the set gets older. Check with www.TvRepairKits.com for the supplies and instruction guide. 

Try setting your resolution to 1400x1050, or the max that is available.
Also, use only 60Hz.
Use the native resolution of the screen, otherwise the laptop will interpolate pixels and make text look fuzzy.

Well what your problem is the antenna is not secured well enough to the roof. You really only have a couple options, you can secure the antenna better or just live with the fact that when it is windy your channels will be fuzzy.

Looks like your backlights are wearing out. Replace the bulbs and you should be fine.