iMac G3 450 won't startup

I came back from vacation and my iMac G3 450 DV is dead. No powerup at all. Nothing. Any suggestions on what to do look for? I think there may have been a lightning strike nearby as the GFCI outlet protecting the circuit got fried. I suspect that powerline in the iMac fuse blew, any suggestions on how to get to it? From a cursory internet search, the prognosis isn't good that even if the fuse is replaced that the PAV will still work.

And I just upgraded it to 1GB of RAM... ugh.