Hi all, hoping someone may be able to help?

I put my phone down in work & when I came back to use it the screen was damaged (blank except for a small section of vertical random coloured lines)

So with the help of this site I got a new screen, replaced it & happy dayz, was up & running again for about 3 hours

The screen started randomly responding to touches then just quit responding. I thot it had frozen so pulled the battery & restarted it to the security code login screen but it didn't accept any presses.

I brought a new digitizer, fitted but nothing has changed... Gutted to say the least!

Does anyone have any ideas? Im gonna call a nokia help centre tomorrow & see if they can help. If i had another one or knew someone who had one I could just swap the whole top slider section & would know if it was there or the actual phone...

PLUS: any way i can access my data? Tried connecting to pc (windows vista) when off & at N900's security login screen & cant access the phones drives... doubly gutted

Thanks guys
ps - if I've lost the use of my N900 - what do I replace it with?