Question USB overcurrent even when no devices are plugged in ?

[Red8]

Hello all,

I've been getting a fault that has been preventing my mobo from posting. It keeps stating that my USB device is having an overcurrent issue. Now this is without any drives or usb devices plugged in. I've checked all usb headers and the ports at the rear of the board and there are no bends, metal pieces grounding or touching, or damage I can see. The soldered points look good too under all of these as well. I've tried to load new bios as well of various versions. I've tried to boot with a drive in each usb slot and removing cmos and no changes. I also have nothing connected to the usb headers. This thing is on a nonconductive test bench. I've also tried different ram sticks and dimms with no changes. I also tried without an IO attached.

I bought this board used and I am past the return period since it was a 3rd party used sell. It was sent with corrupted bios and an m.2 standoff that they tried to glue back into place. I just didn't have all the parts to actually test it. I believe that them haphazardly gluing this standoff back on has been the source of the issue. I'm at a loss and would like to see if anyone has any idea as to what else could be the problem and if this previously mentioned could be culprit. I really appreciate any feedback.

Build is

x670e msi meg ace

7800x3d

2x32 6000mhz gskill rgb / 2x16 corsair vengeance 6000mhz

650w g2 nova

 

[Ralston18]

Any chance that the standoff can be removed? What type of glue was used?

Do you have a multimeter and know how to use it? Or know someone who does?

Before doing anything I suggest some testing to look for shorts - i.e., no "damage I can see".

And try a new fresh CMOS battery just as a matter of elimination. Who knows what the seller may have installed....

 

[Red8]

Any chance that the standoff can be removed? What type of glue was used?

Do you have a multimeter and know how to use it? Or know someone who does?

Before doing anything I suggest some testing to look for shorts - i.e., no "damage I can see".

And try a new fresh CMOS battery just as a matter of elimination. Who knows what the seller may have installed...

Thanks for replying. I removed the standoff and placed it back as well and no changes. I tested the insides of
each usb cluster and the usb headers after about 20 million start ups and they all were within spec and no floating voltage with consistent 5v and nothing to ground or other 2 contacts, I can try a new cmos and see if that works. Is there anywhere else you'd try to test for a short? I'd test the spot where the standoff is but I'm not sure where I should be putting the other lead. It seems to be some sort of clear/slightly amber rubbery silicon material they used to place the m.2 standoff back into the board.

 

[Ralston18]

Silicone - that could go either way.....

FYI:

https://www.masterbond.com/techtips...rength, or conversely electrically conductive.

https://www.circuitsgallery.com/does-silicone-caulk-conduct-electricity/

Look for similar links and explanations.

Check for conductivity between opposite sides of the standoff and between other points as best you can.

Objective being to determine if the glue is conductive.

Use a bright flashlight to look for other repairs or applications of the "rubbery material".

Not unusual to have glue or "goo" to unintentionally end up in other places.