Hp elitebook 840 g5 bios password

[-=Leroy=-]

i don't know why i cant upload directly a file so i attached this link instead.

no need EC file.
first boot press f10 apply factory setting to defaults and exit, and 2nd boot reset security settings to defaults.

Thank you very much!
Your patched bios file worked perfect without touching the EC chip.

[rex98]

Removing BIOS Password please

HP Elitebook 840 G5
S/N : 5CG936B9WW

Attaching BIOS dump of MX25L256 Chip
Thank you...

i don't know why i cant upload directly a file so i attached this link instead.

no need EC file.
first boot press f10 apply factory setting to defaults and exit, and 2nd boot reset security settings to defaults.
here's your DMI info use BCU:
Serial Number: 5CG936B9WW
Product Number: 2FA64AV
CT Number: PGWHQ00WBCQ2YU
Description: HP EliteBook 840 G5
build_id: 17WWCSCT601#SABD#DABD
Feature Byte: 3X476J6S6b7B7H7M7Q7W7m7saBaEapaqauawbUbhcAdUdpdqfAfXhKhkjh.Rq
MAC Address: 04-0E-3C-CC-6D-C6

[Vesko356]

Yes, U366 - ISSI IC25LP128 is indeed the EC memory chip.

[-=Leroy=-]

post EC backup

I found this chip on the backside of the board on U366 : ISSI IC25LP128
I guess this is the EC , right?
I have to unsolder the chip with my hot air station and will post the dump.

[qayyum786]

Removing BIOS Password please

HP Elitebook 840 G5
S/N : 5CG936B9WW

Attaching BIOS dump of MX25L256 Chip
Thank you...

post EC backup

[-=Leroy=-]

Removing BIOS Password please

HP Elitebook 840 G5
S/N : 5CG936B9WW

Attaching BIOS dump of MX25L256 Chip
Thank you...

[rex98]

The fan spins once, the charging light flashes. can you fix the bios?

HP EliteBook 840 G6

serial : 5CG9443TMY

you posted in wrong thread this thread is for 840 G5 only.

[ay_bulut]

The fan spins once, the charging light flashes. can you fix the bios?

HP EliteBook 840 G6

serial : 5CG9443TMY

[qayyum786]

Resistor is between pins 7 and 8

you may try with 10K or 3.3K

[vagabont78]

If it is attach with pin 6 than its a SPI_CLK resistor
you can take a reverence of any schematic which has 25Q128JVPQ
(you can check pin 5 resistor value and place same ohm on missing resistor )

Resistor is between pins 7 and 8

[qayyum786]

Hi, i blown resistor next to 16mb bios chip. Does someone knows what value is it?

If it is attach with pin 6 than its a SPI_CLK resistor
you can take a reverence of any schematic which has 25Q128JVPQ
(you can check pin 5 resistor value and place same ohm on missing resistor )

[vagabont78]

Hi, i blown resistor next to 16mb bios chip. Does someone knows what value is it?

[rex98]

attaching other chip

only flash this ec. use RC unlocker in all HP 16MB ec next time.

[gctdpacov]

this file is not the main bios. find the other chip 32mb and upload here.

attaching other chip

[rex98]

HP Elitebook 840 G5
Serial Number : 5CG9183NQT
Password Remove please
Attaching Backup Bios

this file is not the main bios. find the other chip 32mb and upload here.

[gctdpacov]

HP Elitebook 840 G5
Serial Number : 5CG9183NQT
Password Remove please
Attaching Backup Bios

[piotrekw27]

Thank you very much hoaca388 , with this file the laptop starts in "manufactured" mode (I guess that's how it should be?), after filling in the missing data in the BIOS, everything works as it should. I would like to know how to unlock the 32MB bios myself, but it's probably a secret? Thank you again for your help and best regards

[hoaca388]

hoaca388 Thank You but it still asks for the password on your file.


Vesko356 I don't think there's an option to edit the post, so I'm adding the info here
HP EliteBook 840 G5

CTNumber 6GPRH05TZBF809
Product 2FA66AV
Serial 5CG8509CWB
Build Id 17WWCSBT602#SABD#DABD

Again

[piotrekw27]

VVV

hoaca388 Thank You but it still asks for the password on your file.


Vesko356 I don't think there's an option to edit the post, so I'm adding the info here
HP EliteBook 840 G5

CTNumber 6GPRH05TZBF809
Product 2FA66AV
Serial 5CG8509CWB
Build Id 17WWCSBT602#SABD#DABD

[Vesko356]

Read the rules before posting
RULES UPDATE for BIOS requests/offers *AVOID BANNING, READ BEFORE POSTING*
https://www.badcaps.net/forum/troubl...before-posting

You MUST:

• Provide the full machine model number, serial number (or Service tag, SNID) and the board model number (see https://www.badcaps.net/forum/showthread.php?t=88758 ) ,The serial number, make, full model number, motherboard model and revision (except QR codes) must be written/typed at your request as per the rules. Not as a picture, part of the file name and so on.