Ok then in that case if the tv`s own menuis also affected then this is not caused by external equipment or even the tv`s main board and its adjustments .
If this is a rear projection tv then very likely thatbeside being badly in need of adjustments , you may looking a weak picture tubes and/or contaminated coolant fluid in the tubes that would need to be replaced.
In case of weak tubes , it possibly could be adjusted to a somewhat watchable picture depending on how far gone they are and then about the coolant fluid needing to be replaced , this would definitely affect the picture and very likely again needs to be done anyway.
In either cases though you are looking at something that you would need to help of a local tech and this is not going to cost below some $300 i`m afraid.
If i may be frank , considering the age of the tv and the fact that you can get a new 50" plasma tv with all the bells and whistles for around or less than $600 ,I would think twice before investing that kind of money into this one.
Still , If you go for the repair shop option then look at the links below and enter your zip code ;
Or this one;
This will give you a list of repair shops in your area.
You could give a call to different shops in your area to get an idea of their rates , it pays to shop around.
If that answers your question please do not forget to rate or you can use the reply button before or after rating if you have other questions or need help , thank you