The EliteBook 840 G3 stores the BIOS password on a dedicated chip, but physically removing the Real-Time Clock (RTC) battery can work if the password wasn't written to the TPM chip.
If you contact HP Enterprise Support (not consumer support), and prove ownership (or pay a $50 fee), they can generate a using that PSID. This code is injected via a USB keyboard on the lock screen. How To Reset Bios Password Hp Elitebook 840 G3
To reset the BIOS password on an HP EliteBook 840 G3 try using the built-in HP SpareKey utility if it was previously set up The EliteBook 840 G3 stores the BIOS password
If you have a forgotten BIOS Administrator password on your HP EliteBook 840 G3, you are essentially locked out of changing boot order, hardware settings, or even booting from a USB drive. Unlike desktop PCs, you cannot simply remove the CMOS battery to clear this. To reset the BIOS password on an HP
Each method carries its own risks, and not all may be suitable for your situation. If you're unsure, it might be best to consult with a professional or contact HP support directly for guidance tailored to your specific situation.
| Model | Method Works? | Jumper Label | CMOS Battery Reset | |-------|---------------|--------------|--------------------| | HP EliteBook 840 G3 | ✅ Yes | PSWD or J15 | ❌ No effect | | HP EliteBook 840 G2 | ✅ Yes | PSWD | ❌ No | | HP EliteBook 840 G4 | ⚠️ Different (jumper removed in some) | May need SMC.bin method |