Well what do you know!

One extremely dodgy logic board and about 2 hours worth of disassembly/reassembly, I've got the Mac back! Awesome. Thanks to all you guys for helping out with this.

I will say though, that last time I checked, the thing said 450Mhz. After looking all over for 450 G4 upgrades for Pismo, I found like...none.

Now System profiler says 500Mhz... :shrug: ???

Either way, it works, and I'm very glad.