Is the most likely culprit to be bad capacitors?

Re: MSI MS-6312 Used in Gateway Flex System - Bad Capacitors

Hello everyone.

I've been trying to fix one of those gateway computers with this motherboard. I can see that the two large capacitors that are closest to the memory slots are bulging. Also the two by the power supply look like they have dust from the power supply fan.

I realize how crappy my A+ class was after reading this forum. The books didn't even mention bad capacitors. Now I'm worried about what else I don't know about fixing computers.

Should I always check the capacitors...