Over current have been detected on your USB Device (MSI MAG B550M Mortar WiFi)

Joined
Aug 1, 2021
Messages
5
Hello, I just built my first computer with brand new parts, but I get an error message! Can you find what the most likely problem would be and what I should do?
The error is "Over current have been detected on your USB Device" , and system will shutdown in 15 seconds (before reaching BIOS).

It seems to be related to the USB 3 connection, because if I unplug the USB 3 cable, it starts with no problem and I can access the BIOS.
Does this mean that the problem is likely related to the usb 3 connection?
It's not the same if I try to unplug any other usb cable - as long as the usb 3 is plugged in, the error remains.

The parts are:
  • Case: Cooler Master Silencio S400 TG
  • PSU: Seasonic Focus GX 750W
  • CPU: AMD Ryzen 7 3700X
  • Motherboard: MSI MAG B550M Mortar WiFi
  • Graphics: (old) Nvidia Geforce GT620
  • RAM Crucial DDR4 2666MHz 2x16GB
  • Firewire card (old) Lindy 51180

So I thought maybe it could be something with the case (which has the usb 3 ports and cable) or maybe the connection on the motherboard or maybe some bios update is needed (no idea).
The two usb 3 ports on the case have two cables that are wired together into one usb 3 plug.
You can see some images here: Gallery
Here is the usb 3 connection on the motherboard:
20210731_233529_2.jpg
20210731_233647_2.jpg

USB 3 cable (from the case):
20210731_232427_2.jpg

So I changed the motherboard into an older Acer motherboard, using the same case (with the same USB 3 cable) and the same PSU where I didn't change the cables.
And this time I can get into the BIOS with the USB 3 plugged in.
Parts (with the Acer test):
  • Case: Cooler Master Silencio S400 TG
  • PSU: Seasonic Focus GX 750W
  • CPU: Intel i7-3770 3,4GhZ Ivy-Bridge-DT
  • Motherboard: Acer Aspire X3995
  • Graphics: Nvidia Geforce GT620
  • RAM: Hynix 4x4GB

Pictures of Acer Aspire X3995 motherboard: gallery

So this is as much info I can get - it seems to me that there would be some problem with the USB 3 connection - or could there be related to something else?
Could it be an incompatibility with the graphics card (an old card) - but why is there an over current on that particular usb port then?

I switched back to the MSI motherboard, and attached all the cables and parts - and the problem is still the same.

Could it be some incompatibility between the parts, or is it likely that the motherboard had this fault with the usb 3 connection from the beginning?
Any advice on what I should do next is appreciated!
 
Last edited:

ryegrass

Active member
Joined
Feb 22, 2021
Messages
297
Hello, I just built my first computer with brand new parts, but I get an error message! Can you find what the most likely problem would be and what I should do?
The error is "Over current have been detected on your USB Device" , and system will shutdown in 15 seconds (before reaching BIOS).

It seems to be related to the USB 3 connection, because if I unplug the USB 3 cable, it starts with no problem and I can access the BIOS.
Does this mean that the problem is likely related to the usb 3 connection?
It's not the same if I try to unplug any other usb cable - as long as the usb 3 is plugged in, the error remains.

The parts are:
  • Case: Cooler Master Silencio S400 TG
  • PSU: Seasonic Focus GX 750W
  • CPU: AMD Ryzen 7 3700X
  • Motherboard: MSI MAG B550M Mortar WiFi
  • Graphics: (old) Nvidia Geforce GT620
  • RAM Crucial DDR4 2666MHz 2x16GB
  • Firewire card (old) Lindy 51180

So I thought maybe it could be something with the case (which has the usb 3 ports and cable) or maybe the connection on the motherboard or maybe some bios update is needed (no idea).
The two usb 3 ports on the case have two cables that are wired together into one usb 3 plug.
You can see some images here: Gallery
Here is the usb 3 connection on the motherboard:
View attachment 150720 View attachment 150721
USB 3 cable (from the case):
View attachment 150722
So I changed the motherboard into an older Acer motherboard, using the same case (with the same USB 3 cable) and the same PSU where I didn't change the cables.
And this time I can get into the BIOS with the USB 3 plugged in.
Parts (with the Acer test):
  • Case: Cooler Master Silencio S400 TG
  • PSU: Seasonic Focus GX 750W
  • CPU: Intel i7-3770 3,4GhZ Ivy-Bridge-DT
  • Motherboard: Acer Aspire X3995
  • Graphics: Nvidia Geforce GT620
  • RAM: Hynix 4x4GB

Pictures of Acer Aspire X3995 motherboard: gallery

So this is as much info I can get - it seems to me that there would be some problem with the USB 3 connection - or could there be related to something else?
Could it be an incompatibility with the graphics card (an old card) - but why is there an over current on that particular usb port then?

I switched back to the MSI motherboard, and attached all the cables and parts - and the problem is still the same.

Could it be some incompatibility between the parts, or is it likely that the motherboard had this fault with the usb 3 connection from the beginning?
Any advice on what I should do next is appreciated!
It looks like you've been quite thorough in your troubleshooting. The only suggestions I have are to update to the latest bios 7C94v191 (if you haven't already), and check out the possible contamination in the USB socket (assuming they aren't artifacts from the camera). See photos below:

Plug short.jpg


Plug 1 short.jpg
 
Joined
Aug 1, 2021
Messages
5
check out the possible contamination in the USB socket (assuming they aren't artifacts from the camera).
Yes there is some artifact that has appeare on some of my pictures, I don't know what it is but I think it's an artifact.
I took a new picture here:
20210802_102905_cr.jpg

And now it's suddenly gone. So it must have been an artifact I think.

The only suggestions I have are to update to the latest bios 7C94v191 (if you haven't already)
I don't have windows but I've heard that you can download an update and do it by USB somehow.
I want to do whatever I can before replacing the motherboard, because it would be sad if I got a new motherboard and the same issue would occur.
So it's not easy to know exaclty what the problem is.
And I doubt that the BIOS will fix it since it only affected this particular port(?).
I've googled this issue and most of the time it seems that it doesn't matter which usb ports are plugged in, so they get this issue regardless of what port is plugged in.
In some case , they had turned the cable upside down or something.
But in my case it's only USB 3 and the cable has had the right side up all the time.
It maybe point to some manufacturing error? But I will start with BIOS update!
 

Alan J T

🙈 🙉 Just 🐝 🤬😈
Joined
Sep 11, 2020
Messages
3,993
Check the underside of the board for soldering defects Plug looks good as well as the socket. Problem may be on the under side
You will looking for something like this

1627904610935.png
1627904626890.png
1627904678473.png
 
Joined
Aug 1, 2021
Messages
5
I made the BIOS update, from E7C94AMS.150 to 7C94v191(Beta version)
It says: E7C94AMS.191
20210802_182843_2.jpg


The "over current" is still there though, while usb 3 is plugged in.

I wanted to see if it had anything to do with the GPU:
I removed the GPU , then started the computer. If there would be "over current", then it would shut down after 15 seconds I thought.
But it didnt shut down. So I thought I had isolated the problem to the GPU.
On the other hand, the light on the motherboard stopped on "VGA", so it was stuck there (because it hasn't detected a video card).

So, do you know if the motherboard powers up fully after it has detected the GPU , so that the fourth lamp lights up?
I would think so - in that case there is no indication that there is a problem with the GPU?
So I guess I need to try with a different GPU to know if the problem is related to the GPU (I don't have one though).

There was a strange thing with the GPU though, the hdmi cable signal stopped working, so I had to switch to DVI to get a signal (the hdmi cable works though)
Also,I have previously gotten this message:

"There is no GOP (Graphics Output Protocol) support detected in this card.
20210802_180841.jpg
'BIOS CSM/UEFI Mode' settings in BIOS will be changed to 'CSM'."​
But I didn't see this message now that I tried with the DVI connection. So maybe it went away after the BIOS update, I'm not sure.

The GPU is a old low profile card which does not require extra power. It's only attached to the slot, because I don't have the full height bracket.
20210802_184053_HDR.jpg
20210802_184254_HDR.jpg

20210802_184200.jpg
 
Last edited:

eqwebbie_with_PC

Experienced Dummy
Joined
Aug 22, 2020
Messages
776
Hi,
afaik "over currency" means in most cases there is a short circuit in a USB connector or device.
You tested the case and it's USB connector with another board successfully, so the short circuit has to be on the new board.
I would look if the board touches the case, or maybe if there is one space holder on the case that touches the board not on a screw hole.
If you don't find anything, I would RMA the board.
 
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