I depends on your powersupply.
Look at www.xbox-scene.com/tutorials
Those fuses that you we're talking about are the right fuses. Make sure you get one that is the right amerage. THey're not just universal.
Read the tutorials to find out where your fuse is on your PSU, and to find out how big it is.
AND BE CAREFUL - You're lucky you didn't kill yourself! There is enough power in some of those caps to vapourize a screwdriver.