Hey guys, this week I've had two xboxs that were untouched seals still intact and clock cap leaking everywhere just starting cleaning when i noticed both had the same issue, the two screws on the hard drive caddy that screw the hd to the caddy have unscrewed with vibrations from the drive I would guess as they are both the same side right looking at the front of the xbox,( if the hd spun up the other way probably be the other two) and ended up in the power supply.
May be worth a drop of lock tight or a shake proof washer for anybody still using one.
the screw is nestled in between the the heat sinks next to the transformer.
Ted