I have seen what looks like a potentiameter (pot) on the back of some older monitors with the word "focus" under it. I would pressume that this can be use to focus a blurry monitor...although I have never tried it. You would probably want to go down to your friendly neighborhood electronics store(trying not to advertise for ripoff shack)and pick up a pack of TV tuners if you are going to attempt this yourself. Also, if you do attempt this, do so at your own risk...the voltage across some of the components is lethal...don't touch anything, unless you know what your doing.
Alex
What are those funny purple stars by some peoples names for???