well, if he bent the female jack soldered to the motherboard and crossed 2 or more connections that could have damaged the circuitry of the mobo. If that is the case he might not even be able to use an add on sound card because some of the same circuits will be used for both the onboard sound processor and the pathways to the add on sound card.
His Ipod works great because it is using the input jack instead of the output. And just thinking outloud, if he plugs in his ipod, and he hears sound out of his speakers, then it is not his on board sound that is the problem....tell me Rhibes, what do you mean when you say your "ipod works perfectly"???