I just went and bought a new screen for my PowerBook G4 today!
Now all I have to do is wait 3-4 days. Finally, I'll be able to use it as a laptop, except I don't have a battery…
Before you dare touch a soldering iron again, go down to the local thrift / goodwill / junk shop and pick up the oldest VCR they have and practice until you have a confident method…