Try and Feedback.

1) Flash Patched File
2) First boot will delay a few minutes
3) IMPORTANT: Go to BIOS Setup and reset to Factory Default (first main page tab)
4) Restart and enter BIOS
5) Write original DMI data back or flash original BIOS backup.

Your DMI Data.
Description: HP EliteBook 840 14 inch G9
Serial Number: 5CG3172T6F
Product #/SKU: 6B4Y3AV
Board CT Number: PQSPR00WBI0194
Build ID: 22WWWPBZ602#SABU#DABU
Feature Byte: 476J6S6b7B7H7M7Q7W7m7saBaEapaqauawbUbhcAfAfPgSguhKjhk8mEn7nVngpFpTpnpqprqjqz.Tq...

i noticed there's a lot of unlock request for this model HP EliteBook 840 14 inch G9 and patch won't work if the bios version is latest. use this bin flash both it won't work if you only flash the main you should flash both.
first boot press f10 apply factory defaults and restart, 2nd boot reset security settings to defaults and exit.
use BCU....

Hello everyone. Please help me remove the password.
HP EliteBook 840 14 inch G9 Notebook PC
Serial Number
5CG3173NVC​...

corrupted bios
HP EliteBook 840 14 inch G9 Notebook PC
CTNumber_
Serial_5 C G 2 4 1 6 K S​...

hello help to extract data
HP EliteBook 840 14 inch G9 Notebook PC
CTNumber_
Serial_5 C G 2 4 1 6 K S
Product_
Fearture byte_
Build Id_
from bios main ​...

HP EliteBook 840 14 inch G9 Notebook PC
CT Number_6MBNK0ETZI3H50
Serial_5CG3263BL9
Sku_7K7T0LP#ABM
Fearture byte_476J6S6b7B7H7M7Q7W7m7saBaEapaqauawbUbhcAfPgSguhKjhk8mEn7nVngpDpVpnpqprqjqz.q3
Build Id_22WWWPBZ602#SABM#DABM...

enjoy


Serial Number: 5CG3263BL9
Product #/SKU : 7K7T0LP#ABM
CT Number: PQSPN00WBI92RZ
Description: HP EliteBook 840 14 inch G9
BuildID: 22WWWPBZ602#SABM#DABM
Feature Byte: 476J6S6b7B7H7M7Q7W7m7saBaEapaqauawbUbhcAfPgSguhKjhk8mEn7nVngpDpVpnpqprqjqz.q3
MAC Address : BC-0F-F3-DE-FF-F1
​...

HP EliteBook 840 14 inch G9 Notebook PC
CTNumber_6MBNL0AGWH80E1
Serial_5CG312219K
Product_6B4Y3AV
Fearture byte_476J6S6b7B7H7M7Q7W7m7saBapaqauawb8bUbhcAdpdqfAfPguhKhkjhk8mEn7nVngpTpqqjqz.3G
Build Id_22WWWPBT601#SABB#DABB...

HI Please Help me removing this admin pass
HP Elitebook 840 G9 14 inch
SN # 5CG3263BL9...

please help remove bios password
HP EliteBook 840 14 inch G9 Notebook PC

Serial_5CG3451BGP
​
Thank You...

This specification for the HP EliteBook 840 14 G9 Notebook can be useful for upgrading or repairing a laptop that is not working. As a community we are working through our specifications to add valuable data like the 840 14 G9 boardview and 840 14 G9 schematic. Our users have donated over 1 million documents which are being added to the site. This page will be updated soon with additional information. Alternatively you can request additional help from our users directly on the relevant badcaps forum. Please note that we offer no warranties that any specification, datasheet, or download for HP...

This specification for the HP EliteBook 840 14 G9 Notebook can be useful for upgrading or repairing a laptop that is not working. As a community we are working through our specifications to add valuable data like the 840 14 G9 boardview and 840 14 G9 schematic. Our users have donated over 1 million documents which are being added to the site. This page will be updated soon with additional information. Alternatively you can request additional help from our users directly on the relevant badcaps forum. Please note that we offer no warranties that any specification, datasheet, or download for HP...

This specification for the HP EliteBook 840 14 G9 Notebook can be useful for upgrading or repairing a laptop that is not working. As a community we are working through our specifications to add valuable data like the 840 14 G9 boardview and 840 14 G9 schematic. Our users have donated over 1 million documents which are being added to the site. This page will be updated soon with additional information. Alternatively you can request additional help from our users directly on the relevant badcaps forum. Please note that we offer no warranties that any specification, datasheet, or download for HP...

This specification for the HP EliteBook 840 G9 Notebook can be useful for upgrading or repairing a laptop that is not working. As a community we are working through our specifications to add valuable data like the 840 G9 boardview and 840 G9 schematic. Our users have donated over 1 million documents which are being added to the site. This page will be updated soon with additional information. Alternatively you can request additional help from our users directly on the relevant badcaps forum. Please note that we offer no warranties that any specification, datasheet, or download for HP EliteBook...

HP EliteBook 840 14 inch G9 Notebook PC
CT Number_6MBNN0AX3GN2Q0
Serial_5CG2324Q9V
Sku_6T128EA#ABF
Fearture byte_476J6S6b7B7H7M7Q7W7m7saBaEapaqauawbUbhcAdpdqfAfPguhKhkj4jhk8mEmwn7nVngpTpqqjqz.qB
Build Id_22WWWPAT602#SABF#DABF...

HP EliteBook 840 14 inch G9 Notebook PC
CT Number_6MBNK0ETZI7R8G
Serial_5CG33038Z7
Sku_6W5L9UC#UUF
Fearture byte_476J6S6b7B7H7M7Q7W7m7saBaEapaqauawbUbhcAfPgSguhKjhk8mEn7nVngpFpVpWpnpqprqjqz.A2
Build Id_22WWWPBZ602#SUUF#DUUF...

Serial Number: 5CG3133N35
Product #/SKU: 6W029UP#ABA
CT Number: PQSPQ00WBHLER9
Description: HP EliteBook 840 14 inch G9
BuildID: 22WWWPBZ601#SABA#DABA
Feature Byte: 476J6S6b7B7H7M7Q7W7m7saBaEapaqauawbUbhcAfPgSguhKjhk8mEn7nVngpFpVpnpqprqjqz.dy
try this than replay...

first boot press f10 apply factory defaults and restart, 2nd boot reset security settings to defaults and exit.
use BCU. you can permanently disable Absolute lock in BCU.
here's your DMI:
Serial Number: 5CG3027M3C
Product #/SKU: 6W029UP#ABA
CT Number: PQSPQ00WBHLER9
Description: HP EliteBook 840 14 inch G9
BuildID: 22WWWPBZ601#SABA#DABA
Feature Byte: 476J6S6b7B7H7M7Q7W7m7saBaEapaqauawbUbhcAfPgSguhKjhk8mEn7nVngpFpVpnpqprqjqz.dy
MAC Address : 7C:4D:8F:37:61:FD​...

[QUOTE=rex98;n3317671]

first boot press f10 apply factory defaults and restart, 2nd boot reset security settings to defaults and exit.
use BCU. you can permanently disable Absolute lock in BCU.
here's your DMI:

Serial Number: 5CG30614P3
Product #/SKU: 6B4Y0AV
CT Number: PQSPP00WBHO2JN
Description: HP EliteBook 840 14 inch G9
BuildID: 22WWWPAD301#SABD#DABD
Feature Byte: 3Y6E6J6S6a7H7M7R7W7d7j7m7saEawbUbhcAfAfPguhKhkjhk8m6n7nVngpFpTqjqz.2e


lot of thanks worked 100%[QUOTE=rex98;n3317671]

first boot

first boot press f10 apply factory defaults and restart, 2nd boot reset security settings to defaults and exit.
use BCU. you can permanently disable Absolute lock in BCU.
here's your DMI:

Serial Number: 5CG30614P3
Product #/SKU: 6B4Y0AV
CT Number: PQSPP00WBHO2JN
Description: HP EliteBook 840 14 inch G9
BuildID: 22WWWPAD301#SABD#DABD
Feature Byte: 3Y6E6J6S6a7H7M7R7W7d7j7m7saEawbUbhcAfAfPguhKhkjhk8m6n7nVngpFpTqjqz.2e​...

first boot press f10 apply factory defaults and restart, 2nd boot reset security settings to defaults and exit.
use BCU. you can permanently disable Absolute lock in BCU.
here's your DMI:
Serial Number: 5CG23634TL
Product #/SKU: 6Z4A9UP#ABA
CT Number: PQSPN00WBH31K5
Description: HP EliteBook 840 14 inch G9
BuildID: 22WWWPAT602#SABA#DABA
Feature Byte: 476J6S6b7B7H7M7R7W7m7saBaEapaqauawbUbhcAdpdqfPgSguhKjhk8mEmwn7nVngpDpVpqqjqz.Eg
MAC Address : 38:CA:84:4E:F9:E1​...

first boot press f10 apply factory defaults and restart, 2nd boot reset security settings to defaults and exit.
after following my instruction to get rid of Manufacturing mode. use BCU.
here's your DMI:
Serial Number: 5CG2362VDT
Product #/SKU: 6Z4A9UP#ABA
CT Number: PQSPN00WBH319X
Description: HP EliteBook 840 14 inch G9
BuildID: 22WWWPAT602#SABA#DABA
Feature Byte: 476J6S6b7B7H7M7R7W7m7saBaEapaqauawbUbhcAdpdqfPgSguhKjhk8mEmwn7nVngpDpVpqqjqz.Eg
MAC Address : 38:CA:84:4E:59:F7​...

HP EliteBook 840 14 inch G9 Notebook PC
CT Number_6MBNF0CWYH78KQ
Serial_5CG2461L2C
Sku_5Z695EA#ABH
Fearture byte_476J6S6b7B7H7M7Q7W7m7saBaEapaqauawbUbhcAdpdqfAfPguhKhkjhk8mEmGn7nVngpTpppqqjqz.dD
Build Id_22WWWPAT602#SABH#DABH...

first boot press f10 apply factory defaults and restart, 2nd boot reset security settings to defaults and exit.
use BCU. you can permanently disable Absolute lock in BCU.
here's your DMI:
Serial Number: 5CG3252VHK
Product #/SKU: 88S79EC#ABE
CT Number: PPQBC00WBI726K
Description: HP EliteBook 840 14 inch G9
BuildID: 22WWWPBZ602#SABE#DABE
Feature Byte: 476J6S6b7B7H7M7Q7W7m7saEapaqauawbUbhcAfPgSguhKjhk8mEn7nVngpDpFpVpnpqprqjqz.HB
MAC Address : BC:0F:F3:47:2B:C8​...

first boot press f10 apply factory defaults and restart, 2nd boot reset security settings to defaults and exit.
use BCU. you can permanently disable Absolute lock in BCU.
here's your DMI:

Serial Number: 5CG3124DQ4
Product #/SKU: 6T1H6EA#ABU
CT Number: PPQBH00WBHU1H1
Description: HP EliteBook 840 14 inch G9
BuildID: 22WWWPBZ602#SABU#DABU
Feature Byte: 476J6S6b7B7H7M7Q7W7m7saBaEapaqauawbUbhcAfAfPguhKhkjhk8mEn7nVngpTpWpnpqprqjqz.GM​...