HP EliteBook 840 G7 SO-RAM Replacement - iFixit Repair Guide
HP EliteBook 840 G7 RAM Upgrade and other Blatherings - YouTube
HP EliteBook 840 G7 - i7-10510U · Intel UHD Graphics · 14.0”, Full HD (1920 x 1080), IPS · 1TB SSD · 16GB DDR4 · Windows 10 Pro · 32GB USB Card | LaptopMedia.com