Hi,

I use UEFITool software (all versions) to open the BIOS but the it complaints "Invalid UEFI volume". Then I use ChangeLogo32.exe (copied from Gigabyte @BIOS program, date 9/13/2019, size: 11,2222 KB) to extract the stock logo, the size is 36,864 bytes. I replace the stock logo with mine which is less than the stock logo size. How do I test the modd BIOS to see it bricked the BIOS? What software should I use?

UEFITool opens your BIOS just fine, so not sure what is causing the problem you're running into? I tested with what I usually use to edit with 51, and 25.0
Please try to dump BIOS with FPT for me, using info below >>

You need the V3 TXE ME System tools from "C2" section of this thread, to save you some time with first part
Intel Trusted Execution Engine: Drivers, Firmware & System Tools

The size of this version ChangeLogo v5.0.0.6 is the same with the ChangeLogo v5.0.0.2. However when you check the file property, it shows the real version number.

I used UEFITool version 0.25.1, 0.27.0, and 0.28.0. All of them gave me the same error. Please see the image.

Use UEFITool 25.0 for editing anything. Ohh, I see what you mean now, I had only been looking at it in 51 so far, because that is where I do my inspections and extractions etc.
BUT, what I seen in 51 is what made me ask you to do the dump above, this is incomplete or broken, or just odd BIOS, that's why I wanted you to dump BIOS region with FPT, so we could see what's on chip
You can ignore that error and the BIOS is open in 25-28 etc, but I would not edit it there/like this etc - this is not proper/incomplete/broken BIOS (missing main DXE volume, or it's not expanding properly due to being broken BIOS)

Have you flashed in this BIOS and it's OK/bootable?

Here is the biosreg.bin from stock BIOS.

@ptran3014 - Thanks, that is same/similar as stock BIOS, the last volume is broken (starts at 384000h), other volume overlaps it and it doesn't open/expand properly in any tools.
I assume DXE volume is there, and probably logo too, so when you replace this via changelogo it's breaking it even more.

Do you know any other BIOS that is compatible with this model? If yes, link me to it so I can see if it's broken in same way or not.
If not, maybe best thing you can try is to send your logo to the manufacturer that sent you this BIOS originally, and ask them if they will swap in your logo/ Tell them you did yourself and it works, but messes up BIOS (slow, etc)

@Lost_N_BIOS I already sent the logo for them to replace, hopefully I will have it soon. By the way, they request a logo size of 800x600.
The most important thing I need to make it boot with Windows 7 but both x64 or x86 won't boot and gives me this error.

Make a post in the forum section here about Win7 BCD error 0xc000000d, maybe someone can help, be sure to explain system and oddities about it, and how you are only getting this on install and not a random error on already testing running OS - Windows 7/Vista/Server 2008
It's probably due to the eMMC and windows install going there, then this missing on bootup, or windows install going elsewhere and not there, and then eMMC being only drive seen on startup
Did you test this with and without HDD/SSD installed, so you can test install onto eMMC too?

Hopefully they send you BIOS with logo that boots OK Be sure to ask them to enable Win7 compatibility too