Well you can "fix" the screen by replacing it if you so desire. Take a look here:
msi wind u100 screen, Computers Networking. Great deals on eBay!
As far as backing up your hard drive and or moving it to another netbook, that can also be done with a little know how or some extra money. I'm not sure what drive the wind has but I assume there is an adaptor out there that one can buy that'll allow you to use the drive as a secondary/ portable hard drive. That way you can get your information off it. Or if it has a VGA output you can hook it up to another monitor and send everything you want to save to a backup location/ CD/ DVD.
Hope that helps.