I need help on this msi board H81M-E34 Usb over current error , check all usb ports no broken traces also removed the usb cable for the front panel but still problem exist, can someone help me on this problem please
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Re: Ms7817 (msi h81m-e34) USB overcurrent
Check the resistance to ground on all usb data lines -
Re: Ms7817 (msi h81m-e34) USB overcurrent
USB over current issue is quite easy to resolve, you need a board view to identify the correct resistor to resolve this issueComment
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Re: Ms7817 (msi h81m-e34) USB overcurrent
5V near the usb port
divide the voltage through two resistors
the signal to PCH.
named as USBOC#Comment
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Hello,
So I bought a faulty ASUS PRIME B450 PLUS motherboard off eBay. They said it was water damaged and they cleaned it. The PC POSTs and displays a message that it's detected USB overcurrent and will shut off in 15 seconds. I verified this myself. So I did some checks at the ATX connector 1st to see if the resistance readings looked OK. I found the 3.3V rail measures just 179Ohms which seems way too low. It's been much higher on other AM4 boards I've worked on.
So I did some Googling to see what the potential culprits are. It varies from bad protection diodes, bad...10-18-2025, 05:06 PM -
Hello, so I got this ASUS TUF B450M-PLUS-PRO GAMING come in the shop with an issue of USB Overcurrent Issue. I already disconnect the USB connector going to the front USB port, and Check all port in the back and all are working and no short is detected,. Maybe someone can guide me how this USB Overcurrent Works because I got to boards with the same issue -
I am currently working on a MSI X470 Gaming Pro Carbon that has a weird issue: The board is working fine on startup, but after the BIOS initializes, the board shows "USB overcurrent detected" on the screen and shuts down after 15 seconds. The issue is only happening when the system is ready to boot.
What I have tried so far:
-optical inspection: no damages whatsoever
-BIOS update: The BIOS was updated to the latest stable version (I) using the CH341 1V8
-PM_OC: I checked every double mosfet (7002N) that is connected to that line. All the PM_OC-signals are...09-02-2025, 10:40 AM -
I have ASUS ROG STRIX Z370 motherboard. it sometimes loading windows and sometimes showing usb overcurrent message ...all usb ports are working ... pls give a soluion ... all usb ports has 5V fuses are all good... -
Hello,
Could someone disable USB over-current protection in this bios? Message is displayed over display-port: "Over Current Have Been Detected On Your USB Device!! System will shutdown after 15 seconds to protect your mainboard!!"
Attached dump to this post.
Diagnosed and come to a conclusion that PCH is faulty, there are overcurrent voltage dividers (net names OC#0 to OC#7) on USB power lines, dividers output is nearly 0V, PCH is pulling some of them down. Dividers resistors values are ok and data lines and VCC are not shorted.
Thank...
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