If it looks like [url=http://www.thinkwiki.org/wiki/File:T43-2668-open-GPU.jpg]this[/url] and you're getting a guarantee with those quotes, £90 is a complete bargain. This chip has 609 pins... Six-hundred and nine. There's a reason these come pre-soldered to motherboards. The only realistic option to fix this is [url=http://en.wikipedia.org/wiki/Reflow_soldering]reflow soldering[/url] - not an amateur exercise. If you want to do something yourself you *might* be able to get a bargain motherboard on ebay and swap it out. Again, not the simplest of jobs given the T43 form factor but one you can do yourself (with some care).
Olan, great response, thanks for that. I have been slightly tempted to try the resolder myself as I work in I.T.
Do you know if there is a doc / intsruction manual on how to do the reflow?
I will probably end up getting it done profesisonally but i'd like to make sure that I need to first. Also this isnt my main laptop, its an old-ish laptop that im basically trying to revive, so i can afford to have a blast and mess up without worrying too much.
I tried [url=http://geektechnique.org/projectlab/726/diy-obsolete-ibook-logic-%20board-repair]this[/url] on a friends iBook and it worked. It's probably the most ridiculous and unsafe way of doing it but it worked for me. There is a fair chance you could completely fry the chip.
I love that.
Haha, I cant work out if thats stupidity or pure genius. Suffice to say thats not how im going to handle it.