It is pretty easy to crack a trace on a motherboard. I am not sure if I already posted this... or just thought it... but I have built about a half-dozen desktops since the mid-90s. I have had board failures in about three boards. It was usually a board failure that triggered the next build. I never had a "bad" hard drive. And I was even running a pair of 9 gig Seagate Cheetahs at like 10,000 rpm in 1999. They would get so hot that you could cook on them. Never went "bad." But they have been connected to several different motherboards over the years.