8GB 2 X 4GB Memory for HP EliteBook 2540p DDR3L PC3L-12800 SODIMM RAM (PARTS-QUICK Brand) at Amazon.com
4GB DDR3 Memory Upgrade for Hp Elitebook 2540p Notebook PC3-10600 204 pin 1333MHz Laptop SODIMM RAM (PARTS-QUICK Brand) at Amazon.com
Laptop Hp Elitebook 2540p Refurbished Screen 12.1 "processor I5 2.53 Ghz 4gb Ram Solid State Disk 240 Gb Ssd Webcam Windows 10 Wifi Wireless Mouse As New Battery As New! - Laptops - AliExpress
Working on a HP EliteBook 2540p laptop - upgrade SSD, RAM and W10 - YouTube