http://support.dell.com/support/edocs/systems/pblan/removing.htm

I need to know how to tell which name brand the screen is. According to others they were made by 4 different manufacturers.

The only way to know for sure, if it's not listed under Original Configuration at support.dell.com, is to remove the panel and look at the label on the back of it.

You might be able to repair it with epoxy like I did. Go here for an explaination of how I did it. This fix has lasted for about a year now which is longer than a new replacement generally lasted on mine.

 

http://delltalk.us.dell.com/supportforums/board/message?board.id=insp_general&message.id=194505#M194505