Monitor connections are standard for the industry- as long as the plug fits into the computer - it should work fine.
http://computers.toptenreviews.com/h...-computers.htm
What about asking the computer guy that has worked on yours before,
how much to upgrade it?
But didn't you just get a new mother board & hard drive and more memory fairly recently this spring??
Is it still having problems?
Or are you getting the new one as a second computer?