Please be specific with the EXACT model you are trying to repair.
Once you have established that, a Google search should be enough.
I looked for "inspiron one lcd replacement" and third result down I got this:
http://www.insidemylaptop.com/replacing-cracked-lcd-screen-on-dell-inspiron-1545-laptop/
Use Google intelligently; read and understand. Read again, then do. If you don't undertand, don't do.
Diddlediddledumpling, June 2012