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Stefan Steff · 2025-09-23T15:23:32+00:00

Hello again,
You did OK...and you can start again from 0

About your config.txt...you can insert your MAC address F8-B4-6A-EE-86-99 at HBMA Factory MAC Address and HBMA System MAC Address.
Like this:

Host Based MAC Address
Disable
*System
Custom
HBMA Factory MAC Address
F8-B4-6A-EE-86-99
HBMA System MAC Address
F8-B4-6A-EE-86-99
HBMA Custom MAC Address
00-00-00-00-00-00

...then I always use this rows at MPM:

Manufacturing Programming Mode
Unlock
*Lock
MPM Counter...

Stefan Steff · 09-18-2025, 08:51 AM

OK, You asked for

Here are the details:

The chip you are looking for is U23 (MEC1653) and you don't need to desolder the chip !

Look on the first picture and find all soldering points for JTAG on your MB.
The second picture is how to connect these points to your programmer. ( don't wire #RST )
After connecting and checking all wires start your programmer software and select MEC1653 from EC List, connect the charger and read the chip it should be 290kb.
Save the reading to a file and check with an hexeditor ... it must be all sort of random data...

Stefan Steff · 09-17-2025, 08:58 AM

My English it's not so good...I don't understand what you mean by "... I need to exchange it with others..."
Whatever......

Stefan Steff · 09-17-2025, 08:11 AM

....so what are you waiting for ?
Please elaborate here your finding....

Stefan Steff · 09-16-2025, 12:06 PM

Try this dump:...

Stefan Steff · 09-15-2025, 08:49 AM

OK, so here is your DMI info, It has all info you need:

Description(Product Name): HP EliteBook 840 G6
Serial Number: 5CG93325H3
Product Number(SKU): 4WG26AV
Board CT Number: PHWHN00WBCM389
BuildId(BID): 19WWCFAT603#SABB#DAB9
Feature Byte: 3X476J6S6b7B7H7M7Q7W7m7saBaEapaqauawbUbhcAdUdpdqfAfPhKhkjhk8.BQ
MAC Address: F8-B4-6A-EE-86-99

Take a look to this video and you will do it 100%.
https://youtu.be/BQZfKxjwYU0?si=6oJ9OzkvVyegwY-7

Good Luck....

Stefan Steff · 09-15-2025, 08:39 AM

OK.
Rewriting the EC chip must be the last try if any else isn't working .
A very good hardware check before it's also a good idea...
Good Luck!...

Stefan Steff · 09-14-2025, 09:20 AM

Can you test this patched file and provide some feedback?
The first startup may take a longer time, this is normal...be patient... first startup may take a long time, this is ...

Stefan Steff · 09-13-2025, 10:14 AM

I think RT809H is the best price/value in this category...in fact every programmer has good and bad things but to use it once or twice a year then RT809H is a good choice.
In US you find a lot of RT809H programmers on Amazon or eBay. (ex. https://a.co/d/eUE6vcB)
Look for RT809H not for RT809F !...

Stefan Steff · 09-13-2025, 09:29 AM

It's very tricky to use clips...must be careful and check the reading/writing at least 2 or 3 times to be sure it's done correctly...
As a last try ... here is the EC content.

I hope you can and know how to use JTAG to read/write the MEC1653. (You find plenty of examples here on badcaps how to prepare the MB and use the JTAG to read/write MEC chips...
An example: https://www.badcaps.net/forum/troubl...lock#post74632)
...

Stefan Steff · 09-13-2025, 08:18 AM

Do you use clips to flash the chips or you desolder them ?
Check for missing or damaged components near the BIOS chip.
If programming different versions of BIOS did not result in different behavior most likely you have a hardware issue......

Stefan Steff · 09-13-2025, 07:57 AM

OK.
I see some differences between your PD Controller backup and what I have saved on my PC.
So here is mine to try....

Stefan Steff · 09-13-2025, 06:38 AM

OK, that's good. (PC0PTLL4 with "zero" after letter C.
The 25Q80 chip is your PD controller SPI so must be untouched and write it back as is.
Write the content from the attachment and tell me if it works or not.
It's tested by me on several T470s laptops....

Stefan Steff · 09-13-2025, 06:14 AM

Please provide a serial number and model number.
Let's try to fix your laptop...

Stefan Steff · 09-13-2025, 04:39 AM

Try with this attached content.

STEP 1: Flash and replace current BIOS with the P50_Bios_2_PATCHED.bin file
STEP 2: Boot the machine
STEP 3: Press ENTER/F1/etc. to enter BIOS settings
STEP 4: Enter any character when asked for Supervisor Password
STEP 5: Press enter when it shows Hardware ID
STEP 6: Press space bar 2x when asked
STEP 7: Turn off machine
STEP 8: Restore original P50_Bios_1.bin BIOS content
STEP 9: Reset BIOS settings to factory default

Good luck!...

Stefan Steff · 09-12-2025, 06:25 AM

Very good information.
Thanks for feedback....

Stefan Steff · 09-09-2025, 03:43 AM

Please provide the serial number as per rules.

You MUST:
Read BIOS guides, methods, resources and tools
Try the method at BIOS guides, methods, resources and tools before requesting help
Explain you were not able to succeed with the methods at BIOS guides, methods, resources and tools
Use search function in case someone already answered your request
Post under a related thread if it exists
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=88...

Stefan Steff · 09-09-2025, 03:41 AM

You're wecome!
I forgot to mention to use an USB english keyboard......

Stefan Steff · 09-09-2025, 02:41 AM

Sorry man, I misunderstud your message...probably my poor english is to blame......

Stefan Steff · 09-09-2025, 02:32 AM

OK.
Here is your unlock code : XQ7dLzQNBdZ0D4ZB
After entering the unlock code press Ctrl+Enter....

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