Blue ray writer reader SATA CT21-L - 535759-001 for HP Probook 4710s
How to upgrade RAM memory in HP ProBook 4710s laptop - YouTube
Review HP ProBook 4710s Notebook - NotebookCheck.net Reviews
CMS 8GB (2X4GB) DDR3 10600 1333MHZ Non ECC SODIMM Memory Ram Upgrade Compatible with HP/Compaq® Probook 4535S, 4710S, 4720S, 4730S, 5220M, 5310M - A29 at Amazon.com
4GB 2X2GB RAM Memory for Compaq HP Business Notebooks Business Notebook 8710w Mobile Workstation Black Diamond Memory Module DDR2 SO-DIMM 200pin PC2-6400 800MHz Upgrade - Walmart.com