Problem with motherboard Gigabyte X570S Aero G - no detect RAM

[iT0mT0m]

Hi,

I have problem with detection RAM on this motherboard. When I install CPU(Ryzen 5 2600, 5 4500 or 5 5600G) DRAM Led is lighting all the time. I tried reflash various verion of bios using Q-Flash method and that not resolve my problem. I tried reflash bios by SVOD 4 but that not resolve problem too. All voltages is correct and I don't see any low resistance on coils and other elements on motherboard. I tried replace memory to other and nothing. I don't know where is a problem(maybe connections between cpu and rams socket?). Actually I have boardview for this motherboard and I have boardview and schematic to other board X570 GAMING X where the schematis is similar to X570S Aero G. Anybody have a idea what is going with this motherboard?

[McWhitePink]

Can you use the osciloscope to check the CS pin of the bios, see if CPU is reading it. you should see at least 1 pull down behavior.

[McWhitePink]

If you use a programmer flash the bios, you need to find the bios dump in the forum, the bios file you download from the official website cannot work directly.

[iT0mT0m]

Thanks for answer.
Actually I don't have osciloscope and I can't check it.
I tried find bios dump from working motherboard but anybody don't shared it.

[McWhitePink]

Thanks for answer.
Actually I don't have osciloscope and I can't check it.
I tried find bios dump from working motherboard but anybody don't shared it.

I don't have the board, you may check on eBay and buy an identical board for part, and dump the bios from it, then repair both and sell them.

[McWhitePink]

Can you please share the schmetic and boardview for x570 gaming X?

[iT0mT0m]

[MOD EDIT] External links removed.Thanks for sharing though

[Admin]

Please save files to Badcaps for archive purposes.

Link to schematic in Schematic sub forum - https://www.badcaps.net/forum/troubl...ro-g-schematic

[DynaxSC]

I have a similar Gigabyte board GIGABYTE X570 AORUS ELITE (rev. 1.0) with similar symptoms, this board does not have these EZ Debug LED's, but I have a separate code display board (TL631 PRO). I bought this board as demaged but without any description. This board is funny, it behaves differently dependent on the processor I use:

For Ryzen 3 1200 (no IGPU) it displays some debug codes and stops at code 4D - OEM post memory initialization codes (DRAM LED on TL is lit), which seems to be same as your issue.

For Ryzen 7 4700G the mobo gets after some one time codes at beginning into some loop of debug codes: 02 72 d3 Ad A1 30…. 02… and so on until eternity:

02 - AP initialization before microcode loading
72 - PCH devices initialization
D3 - Some of the Architectural Protocols are not available
AD - Ready To Boot event
A1 - IDE Reset
30 - Reserved for ASL (see ASL Status Codes section below)
- ASL 30 - System is waking up from the S3 sleep state

D3 code seems to be most relevant, there are a lot of posts on forums about this, but no solution, except RMA - people write it has to do something with AGESA version.

Further the board does completely not react to CMOS reset signal, which maybe is different to your situation, but maybe not. The cmos reset signal goes directly to cpu, I tested if it arrives at the cpu, and it is so. This means, that the cpu ignores the signal at all, but it should initiate the cmos reset routine. Question is what could cause the cpu to ignore the cmos reset signal - very strange ???

Further I had in the beginning problem with flash back, didn't work, until i found out, that the name of the file must be gigabyte.bin - kindly from Gigabyte, there is no one word in the original bios update manual about this.

I have programmed by CH341 many different BIOS versions, but no one worked too, no difference in the behaviour, and BTW it is not true a stock bios cant be used on AMD boards, it can, made this a lot lot of times, no issue. (BTW, this board does not allow to program incircuit, so I soldered a bios socket on it).

I even programmed test wise some BIOS'es from similar Gigabyte board's, eg X570 Gaming X, and X570 Aero, funny is, the board is starting with these BIOS'es, but behaviour is the same. Seems the BIOS'es are not very different.

Now I wanted to try to program BIOS from other X570 boards form other vendors, but unfortunately, the Gigabyte BIOS chip is too small (128k), found no one from other vendors smaller that 32k, so I ordered a 32k chip to test it.

I have read lot of user forums, naturally there is not a lot of real technical knowledge there, people suggesting always the same, clear cmos, disconnect power and battery, wait, etc., useless hint's beeing reposted already for 40+ years at any mobo problem.

My suspicion is, that Gigabytes BIOS implementation is buggy, and seems to do something with the board components, so either demaging partly crucial components, or making them enter an undefined state, which is not possible to clear with cmos reset (eg. you can't reset the RAID configuration in the bios with cmos reset, which is reasonable). I think here about the SIO and the chipset, maybe the RTC. Also the codes shown by TL most probably are not related to the real issue, but show only the final impact of the demage.

People report in the forums, that the boards do brake just completely during operation w/o a reason.
One post was about an RMA case, where Gigabyte informed the user that some capacitor was broken. I measures lot of the caps, which are in the relevelant logics, but did not find any shorted.

I also replaced on the beginning the AM4 socket, because it had some demaged pins inside. Tested after replacing with RAM tester and PCIex16 tester, no physical connection problem.

So I'm just stuck with this repair, will try to find another demaged board with a different issue, repair it, and then compare the working board with the the non-working.

Another thing which could be done, it to replace just for the case the SIO as next the chipset, but if the BIOS is crappy sooner or later this will happen again, so I'm not sure it makes sense to further look for the reason, spent already 3 day's on it to no avail.

Maybe somebody else will have and inspiration or knows something relevant.

Anyhow for me this X570 architecture in Gigabyte edition seems to be some kind of mistake and unfinished work.

[DynaxSC]

The BV and schematics for my board is here: https://www.badcaps.net/forum/troubl...69#post3182184

[McWhitePink]

I recently had a similar issue with debug light stuck at CPU, but it's a MSI B550-A. Eventually found the all_pwrgd voltage low, and trace down to a resistor damaged. Replaced that resistor, now it works well. Maybe you can also check all_pwrgd voltage.

[McWhitePink]

actually, the gigabyte bios doesn't need to modify it. you can directly flash it. since you have already done it, I don't think it's the bios issue.
did you check the VDDQ voltage and VTT?

[iT0mT0m]

DDRVTT have 0,6V
VDDQ_SIO have 1,2V
Is this correct voltage?

[McWhitePink]

DDRVTT have 0,6V
VDDQ_SIO have 1,2V
Is this correct voltage?

This is correct voltage.
Should be something else.
Can you check VRM_EN?

[McWhitePink]

or do you see VCORE on the inductors? that is the power for CPU

[iT0mT0m]

CPU is heating up so they has power. Actually I found damaged resistor 8.2KΩ (OR34) and 1KΩ (OR33) next to KBC. I replaced it but no resolve the problem. I started looking on the chipset because on DCL2 coil I have only 3Ω. This is correct value?

[DynaxSC]

I can't look into the BV at the moment, but if DCL2 is some chipset power line, 3 ohm seems to be quite low. I do not have lot experience with AMD chipsets, but Intel chipsets lowest power line resistance is at least 20-30 ohms, and they are much more complicated compared to AMD.