I had similar experience recently. The CPU seems to have gone (tried
it on another board), Two HardDrives totally dead (again I tried them
on other boards).

Am unsure about the motherboard as it takes in the electricity from
another power supply and indicator light comes on but have not yet had
it running.

Memory was OK. The cards for video and sound were OK as were 2 CD/CDr
- so on the face of it things with electrical connectors at the more
sensitive end of things died.

Am not an electrician so find it difficult to interpret why some
things affected and not others

KM