HP ProBook 640 G4 BIOS request

[Rhadu23]

Hello,

Can I please have a clean, fresh BIOS for HP ProBook 640 G4?

SN: 5CG9260GK2

It is the version with 8th gen i5.

Symptoms: powers on, no display, fan at full blast.

Attached is the old BIOS and a new one found on the internet.

[SMDFlea]

Re: HP ProBook 640 G4 BIOS request

Try cleaning the ME firmware first in your original bios backup. If its only that thats coruupt then its an easy fix ,plus you won`t lose any DMI info.If you use a bios from another machine then you`ll have to change your DMI using the hp DMI tools. Also there`s no point posting a bios "found on the internet" unless its a known working one with clean ME FW, and the correct bios version.This model has 2 different bios versions, Q83 and Q77 ,you should open your bios with a hex editor and find out which one you have by using the hex editors text search function .

ME Cleaning guide - https://www.badcaps.net/forum/showthread.php?t=88533

HxD Hex editor - https://mh-nexus.de/en/hxd/
.

[Spider1211]

Re: HP ProBook 640 G4 BIOS request

Try and report back.

As SMDFlea mentioned, use your original BIOS. Use your original 16Mb dump and the attached 32Mb cleanME.

[Rhadu23]

Re: HP ProBook 640 G4 BIOS request

Thank you both for the replies.
I will try it on Monday.

[Rhadu23]

Re: HP ProBook 640 G4 BIOS request

Hello,

I have followed your advice and used the original BIOS and now it works.

Only one error: The MUD from the embeded controller is different than the MUD in the BIOS.

That is what it says upon powering up.

[SMDFlea]

Re: HP ProBook 640 G4 BIOS request

Hello,

I have followed your advice and used the original BIOS and now it works.

Only one error: The MUD from the embeded controller is different than the MUD in the BIOS.

That is what it says upon powering up.

Post your 32MB backup.

[Rhadu23]

Re: HP ProBook 640 G4 BIOS request

Is the one from Spider1211's post

[SMDFlea]

Re: HP ProBook 640 G4 BIOS request

Is the one from Spider1211's post

I meant your 16MB backup .

[Rhadu23]

Re: HP ProBook 640 G4 BIOS request

You can find it in my first post: the "old.zip" file

[SMDFlea]

Re: HP ProBook 640 G4 BIOS request

Your 32MB backup was corrupt. Try this bios .If there`s any more error messages try and update the bios with the one at the support site .

[Rhadu23]

Re: HP ProBook 640 G4 BIOS request

just installed Windows and sone all updates, and after 2nd restart, the BIOS was automatically updated to version: 01.10.00

Also, it updated the Intel Management Engine Firmware.

Updated CCG5 aswell.

PEIA Region also updated.

USB-C Controller Firmware updated.

All of the above happened after Windows updates.

After all of that, it bluescreened with kbdclass.sys error
Then bluescreened again with some kernel error.

The initial error is now gone and the laptop has now booted to Windows with USB and trackpad not working....

[SMDFlea]

Re: HP ProBook 640 G4 BIOS request

Flash the latest bios from HP,don`t let microsoft do it . https://ftp.hp.com/pub/softpaq/sp112...0/sp112372.exe .Try the drivers at HP support listed under "Driver-Keyboard, Mouse and Input Devices"
https://support.hp.com/gb-en/drivers...ok-pc/18602168

[Rhadu23]

Re: HP ProBook 640 G4 BIOS request

I have tried to update the bios with the official one and now... back from where we started

Looks like i have to do it the hard way

[paimz87]

Re: HP ProBook 640 G4 BIOS request

Hello,
HP ProBook 640 G4 locked bios,tried with unlocker but pass remains,any help?Thanks...

[mrwab]

Re: HP ProBook 640 G4 BIOS request

Hello,
HP ProBook 640 G4 locked bios,tried with unlocker but pass remains,any help?Thanks...

try

[paimz87]

Re: HP ProBook 640 G4 BIOS request

Thank You bro.. it's working

[mrwab]

Re: HP ProBook 640 G4 BIOS request

Thank You bro.. it's working

Welcome, put the board code so that others can benefit from it

[Usman1]

Re: HP ProBook 640 G4 BIOS request

hp 640 g4 remove pasword anyone help me

[piernov]

Re: HP ProBook 640 G4 BIOS request

RULES UPDATE for BIOS requests/offers *AVOID BANNING, READ BEFORE POSTING*

— You are requesting help
If you do not abide by the following rules, your post will be deleted.

You MUST NOT:

• Post a request in multiple threads
• Post a request multiple times

[Kesavan]

Re: HP ProBook 640 G4 BIOS request

Hp 640 g4 laptop received for late display issue, so tried for csme clean. After that board not power on. Anyone can help me?