The problem with electrical surge damage is how much non-fatal damage it tends to do. A surge powerful enough to knock out the PSU will generally have a cascading effect on the other components. They still work initially, but have been heavily damaged. It's common for zapped computers to have components continue to fail one after another until the whole system ends up replaced.
To whoever was planning on building a new computer:
One easy mistake to make is not installing the motherboard spacers. It's one of those things everyone thinks is so obvious that nobody (including a lot of manuals) mentions it. Some cases come with spacers already incorporated into the motherboard tray. Others require (generally brass-colored) pegs to be screwed into the tray. They look like the screw holders on each side of a video card output, but longer. They keep the soldered connections on the back of the motherboard from grounding on the case and tray.
I remember back when I built my first in Middle School and didn't realize what they were...poke it too hard and the sound card PCI slot shorted. But, she's still running BOINC in the other room to this day.