HP Laptop ProBook 4540s Used 15.6" Core i3-2350M 4GB RAM 320GB HDD Windows 10 | eBay
CD - DVD drive SATA SN-208 - 657534-FC2 for HP Probook 4540s
HP ProBook 4540s core i5 3rd gen 8GB Ram 500GB Hard Drive Windows 10 Pro 15.6”Laptop with charger in Excellent Working condition!!! Specification: *I for Sale in Aurora, IL - OfferUp
HP ProBook 4540s Keyboard Replacement - iFixit Repair Guide
HP ProBook 4540s 15.6" Laptop Notebook Intel Core i3-2370M 2.1GHz 4GB 500GB HDMI and WIFI