wow, I really want one of those sony ones now.......only 5 in uk ebay, the going rate being 3 figures, not inc. p&p.........most upsetting...
Oh well.
Here is my not so well informed diagnostic.
1. It IS the gpu in the laptop...plugged it into the monitor and hit fn-f5 (its the output to external monitor button on this model) and nothing happened.
2. There may well be more than one issue with this laptop. I can't hear any hard drive noise, or see a hard drive access led lighting up upon booting.
3. I have no idea about the insides because the local pc fixers has (i assume) made all the screws on the panel that hides the last screw and some internal removable bits so that i cannot unscrew them (you know when you use a slightly too small screwdriver and it just makes the screw head too worn away so that you can't get a hold of the crew with the screwdriver.....)

most unhappy.
HOwever due to the number of possible faults, I may just ebay the "$^%ing thing and hope i get a reasonable return. Like, say more than £20....but since the rest of the laptop is in good condition, I might just get that.
*edit* I was considering looking for one (old laptop) on us ebay..is it worth it (ie. safe/worth the shipping costs) to order one to the UK? not that i think it will be, but hey, worth a shot.