How to change the OEM Logo

[impossible_jp]

Hi, all.
I tried changing the boot logo image of my motherboard(ASRock OEM).
When I first tried to change it using ChangeLogo.exe, I was able to extract the LOGO image (BMP format), but when I tried to replace it, ChangeLogo.exe stopped responding.
So I loaded the BIOS file into the UEFI tool and then I searched the first 40 bytes of the extracted BMP file and found the Raw section of the LOGO image.
I confirmed that the size of the extracted BMP file and the size of the Raw Section matched, and when I specified and replaced a new BMP file of the same size, the LOGO image was replaced with the new image.
Details are posted bellow.
https://yuknak.com/main/useful/BIOS_edit/BIOS_edit07en.html
If anyone has posted the same content, please delete this my post.

[trueToastedCode]

@Mechcondrid

so i’ve got a aptio v bios that im trying to change the splash logo on and after flashing the logo is just blank but it shows if i extract the file from the bios afterwards? not really sure what is wrong with it.
the file is called logo.bmp in the bios tree when looking at it in uefitools but the file identifies as a jfif jpeg when scanning it with the trid file type identifier. that and it has to be 118kb or less to fit in the bios image so bmp seems unlikely.

anyone have any ideas?

Easy, using Python. Search for HEX: 20030000580200000100 or 00040000000300000100 using UEFI tool (This means 800x600 or 1024x768 with 1 plane as part of the BMP file header, Example: print(swap(‘{:08x}’.format(1024)) + swap(‘{:08x}’.format(768)) + swap(‘{:04x}’.format(1)))).

It should find some offset. Then we can use python to extract the FV_MAIN_NESTED, replace the logo, keep integrity by correcting the checkums, compress again and rewrite into the bios, correct padding, keep integrity. I’ve done this already to my Laptop Bios Image. Worked without any issue. I would try out my script for you…

[Michael2021]

Good afternoon, Lords of great wisdom. My problem is the following: I bought a Chinese laptop with GN117_MB_V31-T board. (Aptio Setup Utility 2021) (There is no info for that board). And I want to change the logo of the bios. I have used Aptio_V Afuwin to do the bios Backup, then I change the logo with AMI ChangeLogo Tool v5.0.0.2 and everything seems perfect. But when you restart the new logo appears ok. But it automatically enters the bios, appearing a new option RECOVERY, ROM LAYOUT MISMATCH DETECTED - PARTIAL UPDATE IS NOT ALLOWED. If I give ESC it enters windows without problem but always enters the BIOS first, how can I solve that problem. Thank you very much for your help.

[rylos]

Hello. I’m Trying to replace the boot logo on an old AMI bios. It’s a core 8 version of AMI bios from 2010. The motherboard is an ACER H57H-AM2.

- I was able to open the rom in MMtool ver 3.22 and attempt to extract the logo. I renamed it .pcx and tried .bmp with no luck in opening it. I’m wondering if its a GRFX (ami’s own 4 bit filetype). I looked at the file in a hex editor and found no noticeable text info for a header.


any help would be appreciated.

[Koekieezz]

@rylos Could you send the bios file and the logo that you want?

[rylos]

@Koekieezz ok what format do you need the file in? what dimensions do I have to work with? etc.

Thanks

[Koekieezz]

@rylos Your unmodified bios file and the image you want to use (in any format, jpg png tiff bmp etc.)

[rylos]

@Koekieezz Ok this image is too big and most likely wont work in color on this old bios.

[Koekieezz]

@rylos probably it’ll going to be downgraded color like 16bit bmp, let me see the files first and see if i could work on it

[rylos]

Ok here is the rom and the image. it is rotated left because I am using it in a vertical arcade machine.

ROM.rar (900 KB)

[rylos]

@Koekieezz let me know if the image is an issue I am handy with photoshop.

[Koekieezz]

@rylos Im sorry but i cant open the file either. Have you ever tried to dump the bios file from the bios chip itself using intelFPT? you might want to install intel ME driver first (i think it’s version 5 or 6 for you?)

[rylos]

@Koekieezz I have not. I will try that and get back to you.

[Koekieezz]

It’s only my speculation, but sometimes the one that has been written to bios could be different than the raw files one, that’s why everytime i wanted to try do bios mod/changes, i always dump the bios file from the bios chip itself using intelfpt or flashrom on amd.

[rylos]

@Koekieezz yes that makes sense. I’m trying to track down those old intel me drivers. I found some of the old ME System tools on github, but not the drivers yet.

[rylos]

@Koekieezz ok i’m now reading the appropriate page on this forum regarding the windows ME drivers

[rylos]

@Koekieezz I’m running windows 10. It looks like I will have to run windows 7 to install these drivers and extract the bios. I will try and make a boot usb drive in windows 7 and take it from there. I will message when I make some progress. Thank you for your guidance.

[Koekieezz]

I think you dont need to install these drivers, all you need to know is your me version and find any driver from anywhere that is compatible with windows 10. i remember helped my friend h55 motherboard to install me driver version 6 iirc on windows 10

[rylos]

@Koekieezz Ok il will look at it with fresh eyes tomorrow. I tried several and they all failed to install. Even the installer for only the driver failed. Thanks again for your time.

[rylos]

@Koekieezz OK it looks like I hit a wall. The H57 express chipset in my board does not include Intel ME. And I tried to run fptw64.exe and it "cannot be run on the current platform." I downloaded another firmware version for my PC and I had the same issue. When I extracted the OEM logo using mmtool, it contained no header info. I also tried mm tool v326 which produced the same result.

Just a question. If I delete the oem logo module will it just be blank?

@Fernando

Attention:
Old AMI BIOS files are only small sized and it may happen, that the compression potential is not able to replace a small sized PCI ROM Module by a much bigger one. In this case you will get an adequate message.
Tip:
In some cases you can solve the space problem by deleting a module, which is not that important for the use of the computer, for example the "OEM Logo".
Just hit the "Delete" tab, highlight the line with the module you want to delete (example: "OEM Logo"), hit the "Delete" button and save this modification (otherwise you will not get the additional free space!). After having done that you can reopen the just modified BIOS and to retry the replacement of the PCI ROM module.