Hello,
I've been trying to mod my bios (Change the logo),
on my laptop: Acer predator G9-791

Drivers page: acer_DOT_com/ac/en/US/content/support-product/6371?b=1

Original BIOS FILE: global-download.acer_DOT_com/GDFiles/BIOS/BIOS/BIOS_Acer_1.12_A_A.zip?acerid=636752516469847805&Step1=NOTEBOOK&Step2=PREDATOR&Step3=PREDATOR%20G9-791&OS=ALL&LC=en&BC=ACER&SC=PA_6

*Replace '_DOT_' with a regular dot (.)

I've used Phoenixtool256 to dump and edit the logo modules with the No-SLIC option enabled,
and it's done successfully.

When I click OK the system reboots and the flashing process starts, but I get this Invalid firmware image error instead.

I've heard that you need to edit the iscflash.dll file and I tried to do some reverse engineering on it, but I can't get there.
I have a little bit of reverse engineering knowledge, Any help?

Thank you very much.

Hello.

Zitat von w4po im Beitrag #1

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I've heard that you need to edit the iscflash.dll file

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Zitat von Sweet Kitten im Beitrag #2

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No. This bios has a phased flashing process, which means that after launching H2OFFT in windows, it writes the file to a secure area, and only then the bios updates itself. Try using Intel Flash Programming Tool instead.

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Zitat von w4po im Beitrag #3

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Error 316

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Zitat von Sweet Kitten im Beitrag #4

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So, this time it is blocked by FLOCKDN flag. With this error the recommended way to install a modified BIOS is a SPI programming.

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@w4po
Wanna try out a new approach to patch H2OFFT so it will use legacy flashing mode, but not the secure mode?

Zitat von Sweet Kitten im Beitrag #6

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@w4po
Wanna try out a new approach to patch H2OFFT so it will use legacy flashing mode, but not the secure mode?

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@w4po
deleted. Download this archive containing H2OFFT and run the program. If the BIOS installation does not start, and H2OFFT closes without any message, then there is no sense to run it again. If, nevertheless, it will throw an error message, then please write what exactly it says.

Zitat von Sweet Kitten im Beitrag #8

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@w4po
Download this archive containing H2OFFT and run the program. If the BIOS installation does not start, and H2OFFT closes without any message, then there is no sense to run it again. If, nevertheless, it will throw an error message, then please write what exactly it says.

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Zitat von w4po im Beitrag #9

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Do you want me to continue?

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Zitat von Sweet Kitten im Beitrag #10

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Zitat von w4po im Beitrag #9

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Do you want me to continue?

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Yes. You may continue. This is not a modified BIOS, so if it is installed nothing should change.

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It won't shutdown even if I hold the power button. and the battery is built-in

Zitat von w4po im Beitrag #11

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got a blacķ screen with keyboard light on.

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I removed the power cable and pressed the button for disconnecting the battery. then it powered up normally

@w4po
After you continued, was there a lengthy process with a filling progress bar?