How To Remove Bios Password Hp Elitebook 840 G1 May 2026

Important warnings before you start:

• Removing the BIOS password will erase all TPM keys. If you use BitLocker or drive encryption, make sure you have your recovery key before proceeding.
• These steps are for legitimate password removal on hardware you own. Do not use on stolen equipment.

How to generate the code:

1. Turn on the laptop and let it ask for the password.
2. Press the wrong password three times.
3. Crucial step: Press Ctrl + Enter or Ctrl + Alt + Enter. The screen should change to show a "System Disabled" code (e.g., 59920863).
4. Write down this long number.
5. On a different computer, search for "HP SMC.bin generator" or "BIOS Password Recovery for HP" (sites like bios-pw.org are popular, but use at your own risk).
6. Enter the "System Disabled" code. The tool will generate a "Master Password".
7. Type that master password into your locked 840 G1 and press Enter.

Note: This method works best if the BIOS date is set to a specific year. If your battery died, set the date manually via keyboard shortcuts before generating the code. how to remove bios password hp elitebook 840 g1

Step 3: Locate the CMOS jumper

• Look for a two-pin header labeled PSWD or PWD (sometimes J15 or JMP1). On the 840 G1, it’s typically near the RAM slots or bottom edge of the board.
• It will have a small black plastic jumper cap covering two of the three pins (if 3-pin) or just two bare pins.

Method 4: Shorting the EEPROM Pins (Advanced Hardware Method)

This is the most reliable DIY method for the 840 G1. It involves shorting specific pins on the BIOS EEPROM chip while booting. This corrupts the checksum, forcing the BIOS to reset to factory defaults—including the password. Important warnings before you start:

Warning: This requires steady hands. Improper shorting can fry your motherboard. Removing the BIOS password will erase all TPM keys