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[REQUEST] HP Pavilion Gaming Laptop - 15-dk1035tx bios mod
#1
Hello all.

My laptop model is HP Pavilion Gaming Laptop -15-dk1035tx, and the bios version on my laptop is F.41.

I cant use software to get my bios bin file, the only way to get my bios file is download bios updater software from the official website and extract from the exe. 

After i got the bin file, I used H2OEZE tool to extracted SetupUtility module then used IRFExtractor transformed it into txt file. 

In the txt file i found overclocking setting variable address offset. So i tried modGRUBShell.efi to change it . Unfortunately it failed, both setup_var and setup_var_cv

failed. Then i used RU.exe to change the variable in CpuSetup table and it worked! But when i tried to change fan speed variables in Setup table, it poped up

ERROR 0x000001A. I searched the ERROR code in the RU.exe official website and found the meaning is 0x0000001a EFI_SECURITY_VIOLATION. 

I dont know how to remove this error , i guess maybe there is a security method to precluded me from modifing the Setup table.

And now i want a modified bios so that i can use hardware programmer to flash it . I search it in the fourm and find it seems like HP's Bios has RSA encryption.

But then i read the passage topped in this block. My bios name is 08740.bin, not 01xxxx and 03xxxx.

And i used Phoenix Mod to open my bios file ,there is no  that "Decrypted" legend as first output. 

So is there any possibilities my bios is not encrypted.

Also I find that the lastest version is not same with the initial version. the initial version is bin file and the lastest version is fd file.



Following is my questions :

1.Is it possible to flash the initial F.03 version bios by HW Promgramer Since HP dont allowed downgrade bios?
2.Is my bios encrypted by RSA or not?
3.I have change the bios module to change fan speed but i dont know if it can boot after i flashed it.
4.If i flashed the wrong bios file by HW programmer can i use it to flash the original bios to unbrick my computer?

This are my bios files( initial and lastest):
lastest(In the exe by 7zip is fd file and run the exe to extract is bin file) : 
.bin   08740.bin (Size: 16 MB / Downloads: 0)
Initial : https://www.mediafire.com/file/8vxyywv4h...0.bin/file

bios updater download link:
F.03 2020.05.15 : https://ftp.hp.com/pub/softpaq/sp104001-...104017.exe
F.41 2022.09.12 : https://h30318.www3.hp.com/pub/softpaq/s...142492.exe

Thanks a lot !!
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