Heya and welcome to the PCHF!
(: I'm not exactly positive i know what happend but id say you were right when you said it fried it. could it be that when you put your
ram in that you touched the sound card and fried it or something? Sorry if this helps you none, im not exactly a know it all when it comes to the real technical stuff. Plus i'm scared to be wrong, hahah, so yea when someone of higher knowledge finds this im sure they will help you. (: It wont be long before someone helps you. dont freat (:
and welcome again!!!