Re: Tapping Noises
If you have a audio cable between your CD/DVD drive, then it could be your CD/DVD drive. I played with it for at least a week or so on mine trying to get it to go away, then my CD drive stopped working. While it was running, I just pushed in the IDE cable to ensure it was seated properly. In the process, I unplugged the audio cable and the thumping stopped. CD drive was still dead, so I replaced it, and all is good to go now.