I never heard of a piece of electronic gear come with soldered on spare parts..maybe with a seperate loose spare part kit..fuses, knobs, lamps ect. All parts assembled on a PC board have a purpose, some critical for proper operation..others are not. Your capacitor is not a critical component as others have stated..give it a few runs to satisfy yourself of this..then play your games and forget about it. Under no circumstances let a soldering hack get near your PC brd..you hear what I'm sayin, if you have a skilled friend that can do the deed..then go for it.
PS- If you are going to stay with computers..do yourself a favor and get some electronics training, from a ham radio buddy..maybe some cute chick with a degree in EE..heh..ya right ..you should be so lucky..or a learned friend who can take the time to give you some pointers. You will be glad you did down the road. Just some friendly advice..it worked for me.