Time to buy a new LCD.  Repairing them is not easy.

http://www.ccfldirect.com/

Not really user replaceable.

http://www.ccfldirect.com/lcdtutorial.html

Microcenter has Red Rabbit Boxes with Dell's like the D610 for $300

http://www.redemtech.com/refurbished-computers/genuine-microsoft-software.aspx

http://www.redrabbitt.com/redrabbitt/Pages/InventoryBrowser.aspx?menu_level=1&dl=y

Tiger Direct has them also.

http://www.tigerdirect.com/applications/SearchTools/item-details.asp?EdpNo=4415434&CatId=3444

And others

http://www.overstock.com/Electronics/Dell-Latitude-D610-1.73GHz-XP-Pro-Laptop-Refurbished/3827124/product.html

http://www.hcditrading.com/Shop/Control/Product/fp/vpid/6378357/vpcsid/0/SFV/29664

http://www.bobjohnson.com/_store/Display_Buy.asp?prodID=DELL-D610

 

 

http://www.redrabbitt.com/redrabbitt/Pages/InventoryBrowser.aspx?menu_level=0&SummaryFlag=1&PageSize=100&MenuId=2&ViewId=190&PageNo=1&ManfAbbr=DEL&ManfName=Dell+Inc.&ModelNum=MAR%5c40%5cLatitude+D610%5cM%5c1.86%5c0512%5c40%5cDVD&Sku=&center_id=1&Rt=&keyword=