You can fix the backlight, but it's a BIG PAIN IN THE ***. Best to just buy a new screen, much easier to replace.
Found one on ebay: http://cgi.ebay.com/Dell-Inspiron-8...ryZ31569QQssPageNameZWDVWQQrdZ1QQcmdZViewItem
Found one on ebay: http://cgi.ebay.com/Dell-Inspiron-8...ryZ31569QQssPageNameZWDVWQQrdZ1QQcmdZViewItem