Hi Folks
I got an ASUS ROG MAXIMUS Z690 HERO mainboard with missing components on the backside near the HDMI output.
Unfortunately there is no documentation available nowhere for that board, I did also not find any similar ASUS board design. Even Russians nor Chines have anything available here (nor BV, nor schematics), so only way to discover the parts is from a real physical board.
On the picture left the area where the missing componets are is shown.
On the right picture the detaileed view is shown.
It seems that a double mosfet is missing, probably...
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ASUS ROG MAXIMUS Z690 HERO - Component identification
Last edited by DynaxSC; Yesterday, 04:49 PM.
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Check the voltages on chipset if they are present, easiest to do this is on the caps which are on the chipset, the inner pads are always the positive voltage, the outer pads are ground, but use a ground pad eg. in the 12V ATX connector. You should have 3 voltages present in stand-by: 1.05V, 1.8V and 3.3V. If some is missing measure the resistance of that power line (board disconnected from PSU), if you find near 0 ohms, or 0 ohms, 99% the chipset is gone. For the Z390 1.05V line 20-70 ohms are normal, the other lines should have resistances in kohm range.
For replacing chipset you...Last edited by DynaxSC; 04-23-2024, 08:33 PM.
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Checked again, and the 1.2V generated by the PCH is called VCCDPHY_1P24 (Gigabyte boardview naming) - so its 1.24V exactly, I believe this has something to do with the clock generation on the PCH, but I'm not fully sure.
Regarding the sections in the BIOS I wrote about, they are called exatly "GbE region" (LAN MAC Adres is usually stored here) and what I called DMI section, is correctly "NVRAM" section located in the BIOS region.
And another hint, the most important signal from the PCH starting the whole power sequence is SLP_S3# (or N-SLP_S3 on Gigabyte...Last edited by DynaxSC; 04-22-2024, 07:15 AM.
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Btw, check also if the bios image is correct, seen many board with corrupted bios image, not booting, or even not starting the board. Backup first the image, and then write a stock image to the bios - you need a hw programmer, eg. CH-341 (must be modded before used to not destroy 3,3V bios chips, as it has a design flaw already leaving factory - instructions to be googled). The backup is important, as each bios has some personalisation data for each particular board, eg. UUID, serial no or MAC LAN address. This data is not present in the stock image, and if bios is corrupted must be transferred...Last edited by DynaxSC; 04-21-2024, 08:21 PM.
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Hi, PCH's have generally two types of failures: 1. short on any or all of the power supply lines - this is easy to diagnose, 2. functinality failures due to errors in the silicon structure - they lead to fatal failures (no boot, no start) or strange behavior of the chipset/board during boot and operation if any possible. I would estimate first failures type is 70%, type 2 is 30% approximately. The type 2 is much more difficult to diagnose, and can be finally confirmed only by replacing the chipset. Some things can be tested however, eg. If pch is reading the bios on Power Button push (scope eg....Last edited by DynaxSC; 04-21-2024, 08:27 PM.
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Probably some of the VRM's is faulty, before VCORE is going ON, VCCSA and VCCIO must be provided. Look for VRM's having ENABLE active, but producing no power. Another reason can be faulty power sequence logic or faulty Bios image or even partially faulty SIO or PCH. Look for a power sequence diagram, and diagnoze where the power sequence is interrupted. The power sequence can be from a similar mobo same vendor, they are usually very similarLast edited by DynaxSC; 04-10-2024, 08:20 PM.
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Maybe some bad solder point depending on thermal conditions: warm does not start, cold does. Could be anywhere, chipset contact to mobo pads, some smd device, etc. You can try some mechanical pressure, or freezing spray. Could also be the chipset itself, its an old board, so chipset could be at the end-of-life. Chipsets relatively often fail on mobos, they are complicated devices, get quite warm, and can fail in a plenty of ways, also partially.
1.02V for chipset is also slightly too less, should be 1.05V. Some voltage setting precision resistor in the 1.05V VRM might be decalibrated....Last edited by DynaxSC; 02-03-2024, 09:21 PM.
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The BV and schematics for my board is here: [url]https://www.badcaps.net/forum/troubleshooting-hardware-devices-and-electronics-theory/troubleshooting-desktop-motherboards-graphics-cards-and-pc-peripherals/bios-schematic-requests/80184-graphics-card-schematics-and-boardviews/page69#post3182184[/url]https://The BV and schematics for my...st3182184[/url
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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...Last edited by DynaxSC; 01-19-2024, 02:04 PM.
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Most probably your chipset is dead and has a short. You can try to inject voltage from an external steplessly regulated power supply with at least 10A current output behind the PQ301. Set the voltage eg to 1-2V, and increase the current limiter from 0 in 0.5 A steps until you can identify a hot spot. Take off the chipset cooler for this. To better find the hotspot you can spray isopropylic alcohol on the board. It will vaporize in the hot spot. Inner side of the hand is also a good temperature sensor (attach it to the buttom side of the board to first find the approximate hot spot area location),...Last edited by DynaxSC; 01-08-2024, 08:20 PM.
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Hi my Friend
I have some experience with Renesas programmable VRM controllers ISL and RAA. Renesas has a software called Power Configurator allowing preparation of an configutation file, but the issue is this works only one way, so you can prepare the config file and program it to the VRM chip, but you can't read any configuration file from the chip. However it is possible to compare if the prepared configuration is same as in the vrm chip, but you get only a Yes/No information.
The configuration setup is quite difficult, there are some default settings in the software, but...Last edited by DynaxSC; 01-05-2024, 09:55 AM.
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BTW, the bios chip make and type is usually to be found in the descritor region of the bios. Once you download the bios image you can view it with UEFITOOL (newest is A68), find the descriptor region and you will see the chip make and model. Usually several makes/models are listed, they are equivalent.Last edited by DynaxSC; 12-15-2023, 02:19 PM.
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Why don't you use Flash Programming Tool (fptw64.exe) to read the Bios ?
It'a part of CSME System Tools, you can find this under this address:
[URL]https://winraid.level1techs.com/t/intel-converged-security-management-engine-drivers-firmware-and-tools-2-15/30719[/URL]
You need to download the correct version for your chipset generation, and you can easily download the bios from the chip on the disk with a simple command (under windows and cmd window):
FPTW64.exe -d biosbackup.bin
It is also possible to write (not update) the bios with the...Last edited by DynaxSC; 12-15-2023, 02:09 PM.
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MSI PRO B660M-G DDR4 - real bios dump from board needed (no stock bios)
Hi, I have an MSI PRO B660M-G DDR4 board with damaged BIOS and i need a bios dump from a real board, along with MAC, UUID and Serial Number info (eg. a BIOS screenshot and pictures from the board stickers).
I need to reconstruct the bios on my board, based on another bios image form a real board - meaning a bios image containing MAC address, UUID and Serial number. A stock BIOS is not suffiecient, as it is impossible to discover where the MAC, UUID and SerialNumber are stored. Tried with a similar board, but there are too much differences, and the stock BIOS is missing a lot of...Last edited by DynaxSC; 11-17-2023, 11:42 AM.
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Re: MSI K7T266 Pro (Ver. 1.0)
The electrolythic caps are not very critical components, usually you can just exchange them to different vendor. Look for good quality components (Nichicon/Panasonic/Chemicon are very good) and matching size/case, capacity, max. working temperature (the higher the better, the caps usually have the max. working temperature printed on the case) and internal resistance of the caps -> ESR (the lower, the better). If the caps are several in parallel, better exchange them all, if they would be different make. The one with 4700uF just try with 3300 uF and...Last edited by DynaxSC; 11-10-2023, 05:18 AM.
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Re: Rx580 8gb sapphire nitro+ turn off vcore randomly
Could be a problem with the over current monitoring network of the gpu vrm (driver). Look for missing or decalibrated components in this network. Another issue could be a thermal issue, eg. a non contacting joint GPU-board, DRAM-board, you could try a reflow/reball.
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