What happened to my sound!

For reasons best known to myself, I took out my Ram and my CMOS battery to try them on a computer I’m attempting to build for my mother(!). To cut a long story short, when I reinstalled them back onto my computer, the sound has started to loop. I’vechecked the soundcard to make sure I hadn’t dislodged it and also checked all the ‘wiring’ to make sure nothing had come out of place, but all to no avail. The only thing is, the CMOS battery has died on me, probably due to all the hand contact. Could this have anything to do with it? Help…I WANT MY SOUND BACK!!!