No worries, just thinking because I fixed one recently with a similar problem.
My own Acer had a problem not so long ago where the screen was going a funny colour - this was down to a loose connection on the RAM.
But the fact you say it seems to work fine when you touch the screen makes me think it's a loose connection the display as the RAM is in the base of the unit.
If you don't feel happy about ripping the insides out yourself and potentially making it sacrofical then a small computer store or PC World should be able to help you.
Hope this helps,
Dazza :cool: