[Problem] Extraction of the pure BIOS from an HP EXE file

BIOS/UEFI Modding BIOS Modding Guides and Problems
1

Hi, I need help with finding the correct .bin file in the .exe that I downloaded from hps website to use a ch341a programmer to write to the chip. In the .exe, there is .bin file labelled T77_01210000 but it is shown as 35,748KB which is higher than the 32MB capacity of the chip.

(HP Elite book X360 830 g8, Winbond 25Q256JVEN)


Edit by Fernando Thread title customized

2

You can try to reconstruct it from your original dump and replacing volumes from HP file.

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3

what do you mean by original dump? is that the bios file thats already on the chip? if so, the bios file on the chip is corrupted and may not be able to do that

4

What kind of question is that if you intend to use a SPI programmer…of course that it’s the reading from the IC.
Corruption has a certain degree… and the original HP system data is there.
It will be lost forever if overwritten…your call.
Did you even bother to explain what happened to the system…
A lot of info on similar HP recovery’s on the forum… enjoy the reading, good luck.

5

Heya,

I’m currently trying to fix a broken BIOS on a HP desktop PC (see thread [Problem] HowTo Fix HP Z2 Mini G9 Workstation BIOS Issue? ).

My question is if it’s possible to prepare a downloaded .BIN file from HPs website for directly flashing to the chip? When looking at the two .BIN files, one downloaded and one I dumped, the downloaded one is around 2MB smaller than the dumped one. The downloaded .BIN also seems to contain data way earlier when looking at it with a HEX editor, and is zero’d out in the beginning where as my dumped one is filled with FF till a few pages down.
I’d also have to edit the BIOS and add the serial number from my understanding, however correct me if I’m wrong.
On top of everything there are 2 chips on this mainboard, one for the BIOS and one for Intel ME. However HP only provides one update package with just one .BIN inside.

Thanks already for your help!


Edit by Fernando Thread title customized

6

If you want to modify an HP BIOS, you have to download the offered *.exe installer and to extract the included *.bin file as first step, but the real problem begins while trying to flash the modded BIOS.

7

Yeah, the .BIN extraction was easy, just the preparation for flashing is the hard part now :sweat_smile: