[Help Request] Asus Prime x370 pro motherboard will not post

BIOS/UEFI Modding BIOS Modding Requests
1

Hey all, so I have this desktop I dragged out of storage and I have not been able to get it to boot. I have checked the CPU, Ram, GPU, Power supply, everything seems to work so I suspect its the motherboard giving me trouble.

I got out my ch341a, backed up and flashed fresh bios from asus (downloaded the latest, unpacked with uefitool and flashed), but it has not solved the problem, it does give 6 short beeps right after a flash, but not the next power on.

Symptoms are; fans spin, usbs are powered, no display out through the built in hdmi or the graphics card, power button does not turn off the machine with a short press, no beep codes even with no ram installed, asus shielded area gets warm not hot tho (Assuming this is the north/Southbridge).

What I have not tried is hooking up a serial mouse/keyboard or installing a harddrive, I assume these wouldn’t keep it from posting.

Edit: Moved to Bios Modding Requests.
If someone can patch me together a working bios out of the dump that would be awesome. I am at the point that I’d like to learn how to do it myself, but not having experience with it, I’m not sure that the motherboard would revive even if I did everything %100 correct.
dump001.zip (8.1 MB)

Edit2: So I discovered the fd44 tool, surprised that the bios modding posts on here didn’t mention it. Loaded up the data from the dump to a new bios of the same version, still no luck. The GBE and ME versions are not present tho, so perhaps I’ll have to mod in those to get it to post? Then figure out the checksum, because apparently thats a thing with asus?

2

6 Flash update is failed

After programming, dump again and compare source file.
You may need to try a different app on the CH341A

or

Use direct dupont cables to the header next to it.
image

3

Thanks for your quick response, so it looks like the 6xxx series bios changed the format, 5xxx and 4xxx dont give the 6 beeps. With these versions, it will give me a long and 2 short beeps, memory error when I have the ram out right after a flash. If I install the ram, it goes silent and I can no longer get it to beep no matter what I do besides a fresh flash. If the ram is in after a flash, it doesn’t give any beeps at all.

Upon further inspection, the data on the chip is completely unchanged when powered on without ram, but is changed quite a bit after powering on with ram. It seems to be sensible data, not just FF.

4

That is probably due to the AGESA v2… you should try to reprogram the same branch and not jumping around in AMD platform… it may several internal details in code that re-organize other ICs related and are not shared from AMD or Asus outside, even less for simple users like us all.
My POV only, you may wait for other users, good luck.

5

I haven’t written many BIOSes with an external device, but it has probably never worked with the content you can download from the manufacturers’ site under BIOS, as they are not complete. Last time, for example, I only managed to breathe life into an ASUS board by writing modified(!) content. I tried several factory contents, but none of them worked. But as I wrote, these were all classic contents, not contents that can be read from EEPROM by an external device. I’ll give you a BIOS to try to flash in, maybe that will get the machine working.

6

Worth a shot

7

Try both. If the motherboard doesn’t work exactly the same as with the factory BIOS, I don’t think there’s much you can do. It’s not at all certain that the BIOS is faulty. It may matter if the error behavior is different from the factory BIOS.

8

Both are acting the same as the 6xxx series bios files, 6 short beeps right after a flash and no further notification/error and still no post.

9

bump

I could still use some help with this if someone out there is willing.