How to Upgrade HP Elitebook 840 G3 Memory - YouTube
Amazon.com: HP Elitebook 840 G5 14-inch FHD (1920x1080) Business Laptop (Intel Quad-Core i5-8250U, 16GB DDR4 RAM, 512GB SS USB Type-C, HDMI, Windows 11 Pro (Renewed) … : Electronics
HP EliteBook 840 G8 Notebook Laptop BOOTS Core i7-1165G7 16GB RAM 256GB SSD | Being Patient
HP EliteBook 840 G6 RAM/Memory Upgrade in 5 Minutes or Less | 9to5gadgets
HP EliteBook 840 G10 14" Notebook - WUXGA - 1920 x 1200 - Intel Core i5 13th Gen i5-1335U Deca-core (10 Core) 1.30 GHz - 16 GB Total RAM - 512 GB SSD