Replacing the inverter can be somewhat difficult as it requires removing the screen and the supporting brackets, then carefully removing the inverter leads from the cfl (they are generally soldered on). A full screen replacement is easier, but more expensive - you also need to make sure you get the same screen size and resolution as the original.
The cable is not to difficult, but does requires some rather unique twisting to get it to lay flat. Generally speaking, I doubt the ribbon cable has gone bad, but it's possible. Finding a replacement may also be difficult as the connectors may be specific to each laptop.
Either way it's a crap shoot, and I would recommend a complete screen replacement for both. There are a number of resellers who carry both factory OEM replacements and aftermarket replacements - just be sure you get a compatible unit. You can also check ebay for used units that have been parted out from dead laptops, but you run the risk of a unit that may not be "as advertised" or have a short life span.
Mark