Solved: How turn on and off NFC on HP EliteBook 840 G2 - HP Support Community - 5115016
installing NFC Module on EliteBook 840 G3 - HP Support Community - 6500777
Advisory: HP EliteBook 8xx G4/G5, ProBook 4xx G5, 6xx G4 and ZHAN 66 Pro G1 Notebook PCs - Display is Distorted when Starting/Restarting Computer After Legacy Mode is Selected in the BIOS
A thanks · Issue #1 · kinoute/Hack-HP-EliteBook-850-G5 · GitHub
Solved: Fingerprint Scanner is not working - HP Support Community - 8408136
HP Elitebook 840 G3 Bluetooth not detected - HP Support Community - 7526054
HP EliteBook 840 G5 Notebook PCHP EliteBook 846 G5 Notebook PC Maintenance and Service Guide
Amazon.com: HP Elitebook 840 G5 14" Full HD FHD (1920x1080) Business Laptop (Intel Quad-Core i5-8250U, 32GB DDR4 RAM, 1TB PCIe NVMe SSD) +Docking Station, Backlit, Fingerprint, Thunderbolt, Windows 10 Pro : Electronics