Just got done messing with an older server. Fan on the Northbridge stopped running and caused it to over heat. Put on a new fan, but it was to late. Chip was cooked. Luckily we had a second motherboard handy, so I was able to swap it and get it back up.

Most of the downtime I see is similar, older hardware that should never have been turned into a server in the first place. A previous vendor was hot on the idea that there was no sense in paying for full blown servers.