I have an IBM Thinkpad X40. Have had it for 3 years
Spilt liquid on the screen a while ago and now, although the screen works still, it has a kind of mottled tidemark effect and is dark in places (can also see where drops of water are permanently "stuck" behind the screen).

Is this fixable? Would getting the screen replaced solve the problem, or would it need more than that? Roughly how much might it cost to get this repaired?

I don't have a huge amount of money to spend on repairs. Does anyone know the average useful life of this sort of computer, and whether it might just be worth going for a new (slightly cheaper) laptop?