That depends. Now this may be a silly question but have you replaced it with the correct PSU.
I say this because for example, if you have a dell machine and replace the psu with a standard off the shelf part, it will not work as they swap many of the wires round.
If a capacitor actually 'blew' then this would have caused a surge into your components. Newer and more expensive psu's prevent this disaster from happening. Have you had lightening in the area recently?