Touch screen Acer Z5710 failing

ceesdk

Hello,

I have an Acer z5710 with strange behavior touch screen, there's a certain area on the screen

where it won't react. The problem is visible if you use paint to draw lines accross teh screen

see my sample picture.

Someone has a clou what's wrong with the screen ?

ceesdk

Added information,

After i decided to take the system apart , i removerd some parts, then i realised i'll better wait

for a response on this board. 

So replaced the parts and started windows, now with paint the screen isn't the same as at the

first picture. Does this ring a bell for somebody ? See econd picture.