Tried open firmware reset to cure PL coma?

[Hal]

There's an article on the front page of xlr8yourmac.com about an AGP 
owner with a PL 1.2gHz upgrade that cured his coma problem by booting 
into open firmware and doing a full system reset to default and 
restart. Has anyone with a PL upgrade Cube coma problem tried this?

Just trying to help, as I'm still saving my pennies for an upgrade 
myself, and I plan to go with a PL...

cheers,
-Hal