While unusual, such things do happen when power supplies fail. I was witness to a total machine wipeout when the power supply failed. Not much survived.
I returned home today to find a burning smell coming out of my computer room. When I went in there I noticed my GE Optical Mouse had melted itself into a mess and was proceeding to burn a hole in my mouse pad. I ended up having to turn off the computer and wait till the mouse was cool enough to remove it. But not my PC won't come back on. Has anyone else had their mouse melt on them?