Well I found the issue. I managed to work out how to pull my N810 apart and get it back together again.

I think some water got into the back of the screen. The ribbon cable going from the body to the screen has left a pattern of marks on the shell of the n810 that match the wire configuration in the ribbon cable.

Basically its worn away too much of the conductive material so the single does not reach the screen properly.

Anyone have any suggestions on how i might go about getting a replacement ribbon cable for the screen?
If i contacted nokia would they sell me the replacement?