My RCA projection TV Died what do I do?

I have an RCA 52" Projection Tv, I bought it almost 7 years ago and after about 2 years the Amplifier stopped working so I had to use alternate sound.
Two night ago In the 3rd Period my TV squished into small dot in center of TV and turned off, it will not show anything on screen.
I have removed the insides of it to perhaps take to repair shop, but maybe someone knows how fix it??
I have alot of dust inside TV would a good cleaning help to make it work??