In this guide, I’ll disassemble HP EliteBook 840 G1, refer to this guide, you can upgrade, repair and clean your laptop, or remove and replace the battery, hard drive and wireless card.
Unlock this latch. You can remove the service cover.
Remove the service cover
Here are RAM and wireless card.
HP EliteBook 840 G1 has a spare RAM slot for user upgraded RAM.
HP EliteBook 840 G1 heat sink and cooling fan module
HP EliteBook 840 G1 hard drive module.
Remove four screws. You can remove it.
Remove the screws securing the battery. You can remove the battery.