If your anywhere Liverpool I own a laptop repair center and we do free diagnostics and very reasonable repairs, 9/10 motherboard faults are indeed repairable, usually a fuse, diode or voltage regulator on the power circuit,
Feel free to call 0151 280 9101 to get through to the shop, you can always post it for a free diagnostic, and if you wish it repaired, just pay for return postage.
Average laptop repair on motherboard is around £70 when doable.
Regards
Paul
June 2009