BIOS crashes when using USB device (MSI B550M PRO-VDH WIFI)

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May 20, 2022
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Hey everyone, today i build my new pc and when I try to use any USB device in the BIOS it crashes.

The problem

The system loads into the BIOS as it should and all components are recognized (CPU/RAM/M.2) but as soon as i use my keyboard or mouse there is a short lag then the cursor moves and then the BIOS crashes. The screen turns black, shows no signal and the kb and mouse turn off, the fans of the computer stay on. After a few seconds the kb and mouse turn back on and the BIOS screen comes back, if I use my kb or mouse again it lags and crashes again. Sometimes I can navigate through the BIOS for a few seconds but it eventually crashes. (it crashes faster when I use the mouse and works a little longer using kb) It also crashes when I start up with a bootable Windows USB-stick in. When I don't do anything the BIOS stays on forever and doesn't crash (with multiple USB devices connected) but as soon as I use my kb or mouse it crashes.


The system

CPU: AMD Ryzen 5 5600G
Motherboard: MSI B550M PRO-VDH WIFI
BIOS: E7C95AMS.280 (06.22.2021)
RAM: 16GB (2x 8GB) G.Skill Aegis DDR4-3200 CL16
M.2: SAMSUNG SSD 980 500 GB
PSU: 500W Seasonic
Case: Aerocool Trinity Mini-G-BK-v2

What I've tried
  • - different keyboards and mice (both wired and wireless, they all work fine on my other system)
  • - only connect one USB device at a time (kb OR mouse)
  • - every USB port
  • - different display connections (DP&HDMI)
  • - cleared CMOS
  • - disconnected front USB
  • - checked all cables
Nothing worked.


XHCI hand off and legacy USB support are enabled, I was able to check that just before it crashed. I don't have a keyboard or mouse with PS2 plug.
The only thing that I can think of that is left is updating the BIOS. However I am hesitant to try that since it uses USB and if it's a USB issue it might crash and brick the system.

I hope someone has experience with this issue and can help. Thanks in advance.
 

citay

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Oct 12, 2016
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Ok, you seem to have some type of instability. First off, your Seasonic PSU, which model is it exactly and how old is it? Seasonic makes very solid PSUs nowadays, but in the past there were some models which weren't so good and are prone to develop defects with age. Updating the BIOS is a priority with a new build, but yes, only if the basic stability is assured.

If you can borrow or obtain a different PSU, it's definitely one of the first things to test, i wrote a Guide: How to find a good PSU.
Also, you can try placing the mainboard on a wooden table to exclude the possibility of a short with the case.
 
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The PSU is a Seasonic S12III 500W Bronze. It's brand new. I don't have another PSU.
I've testet the system in and out of the case, no difference.
I've also fully disassembled and reassembled the system and checked CPU pins.
 

citay

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Oct 12, 2016
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If you look at the PSU tier list, the S12III is classed as "Tier E • Avoid" for apparently missing an important protection feature, namely OCP (OverCurrent Protection), as well as the somewhat less important OverTemperature Protection. The OCP is important because it's a very quick-acting protection that works similar to a house fuse, preventing damage down the line.

I'm not sure if the problem disappears with a better PSU, because it's an odd problem. But it sure is one of the first things i would try, because you don't want to troubleshoot for ages when perhaps it was the PSU all along. And even if it doesn't end up solving the problem, i would like to use a better PSU, personally. For example, as i write in my guide, i wouldn't even get an 80PLUS Bronze unit anymore, Gold units are not that much more expensive and often technologically much better.
 
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I just pulled a functioning PSU from an older system I still have, Corsair CX750 (6-8 years old, don't remember) it works perfectly in the old system. Hooked it up to the new one, cleared CMOS, still same issue, BIOS crashes.
Bummer I didn't know that my new PSU is apperently not so great (I trusted the brand name) but it doesn't appear to be the issue.
 
Last edited:

laurence1211

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I just pulled a functioning PSU from an older system I still have, Corsair CX750 (6-8 years old, don't remember) it works perfectly in the old system. Hooked it up to the new one, cleared CMOS, still same issue, BIOS crashes.
Bummer I didn't know that my new PSU is apperently not so great (I trusted the brand name) but it doesn't appear to be the issue.
What happens if you take out the storage?
 
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May 20, 2022
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Removed the M.2 SSD and booted into BIOS, still crashes.
Also removed RAM and tried with just 1 in different slots, still crashing. (it did warn me the the RAM configuration wasn't ideal on start up, when i used different slots)
All settings are default, no overclocks on anything. (xmp not enabled)
 

laurence1211

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Removed the M.2 SSD and booted into BIOS, still crashes.
Also removed RAM and tried with just 1 in different slots, still crashing. (it did warn me the the RAM configuration wasn't ideal on start up, when i used different slots)
All settings are default, no overclocks on anything. (xmp not enabled)
Either its the bios not flashed correctly or its a hardware fault(cpu/motherboard), either way i cant think of anything else it could be. RMA the motherboard, would be what i would do.
 
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Makes sense. I've tested everything I can, the CPU has no bent pins and falls into the socket like butter. Most likely BIOS or Motherboard issue.
I've contacted MSI Support directly, see if they want me to try flashing the BIOS or just RMA the Motherboard.
Thanks for your help.
 

laurence1211

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Makes sense. I've tested everything I can, the CPU has no bent pins and falls into the socket like butter. Most likely BIOS or Motherboard issue.
I've contacted MSI Support directly, see if they want me to try flashing the BIOS or just RMA the Motherboard.
Thanks for your help.
I would take it back to the retailer, which is what msi will tell you eventually. Still good luck, hopefully you get it sorted.
 

eqwebbie_with_PC

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Sounds like some short circuit issue to me. I myself would try if the board runs out of the case; maybe one of the USB ports has contact with the case.
 

Alan J T

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Makes sense. I've tested everything I can, the CPU has no bent pins and falls into the socket like butter. Most likely BIOS or Motherboard issue.
I've contacted MSI Support directly, see if they want me to try flashing the BIOS or just RMA the Motherboard.
Thanks for your help.
Sounds like some short circuit issue to me. I myself would try if the board runs out of the case; maybe one of the USB ports has contact with the case.
They have tested out of Case I would be doing a RMA by now.

I have a pretty hard rule I have most the gear to test as well as spares, and if I can not get post with in x amount of time depending on component it is Returned under warranty or replaced depending on age of part..
Generally that is about 3 hours of constant testing and perhaps 2 to 3 hours of research for a solution I may have missed for the problem.


Best solution for most people is when you order your parts order all from same place and coff up the assembly and test fee most times this is under $100 local. Will save you a [***CENSORED***] load of headaches.
 
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Oct 7, 2021
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Either its the bios not flashed correctly or its a hardware fault(cpu/motherboard), either way i cant think of anything else it could be. RMA the motherboard, would be what i would do.
Good call here. Although I would've been brave/stupid by attempting a BIOS update from the root of C:\ within M-Flash and risk bricking the board!
 

bobcobb1158902de

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Aug 16, 2020
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Makes sense. I've tested everything I can, the CPU has no bent pins and falls into the socket like butter. Most likely BIOS or Motherboard issue.
I've contacted MSI Support directly, see if they want me to try flashing the BIOS or just RMA the Motherboard.
Thanks for your help.
Have you tried disabling the Precision Boost Overdrive and Core Performance Boost ? Because this helped my random reboots. Although my processor is different (3700x), when I did experience random reboots, my system fans would go to 100% and I'd have to hit the reset switch to reboot my computer. I've also read that changing your Ryzen Power Plan to High might fix the issue.

B.
 
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