Hi this is a really odd case.
I have removed all of the esd ic for USB 3.0 and 2.0
I measured all of the data lines and 5v usb voltage lines there are no shorts
all of the USB ports have no damage
Clearing the bios using the jumper wont help.
it is still showing USB overcurrent device
the only temporary fix I've tried and worked so far is flashing the bios
and the error is gone
but when you start the motherboard with a USB device still attached
the USB over current device error is back. the bios needs to be externally flashed again
if you only plug a ps/2 device it is fine.
if you restart it without a USB device the USB over current device error wont show.
All of the voltages of USB ports while the motherboard is running is normal 4.950v - 5.080v
it only triggers when starting up the motherboard when a USB device is plugged. and will stay stuck on that state unless the bios gets reflashed
the only odd thing i found while checking the resistances of the USB ports are the USB 3.0 port USB3_E2_5 has a different value of resistance (6.88k ohms) on
its first pin (5v) although this might be happening since it is connected to O3U3 ( POWER SW. NCT3520W-H15 MSOP-8)
other than that all of the USB port 2.0 measured are in 5.4k ohms above for data lines and 1kilo ohms and rising for the rest of the USB port voltage pins
USB port 3.0 primary data lines measured 11.8k ohms to 12.5k ohms
except for the one mentioned above
I have no idea where to check now since there are no shorts and i don't know if there is a problem with the pch but i am hoping that is not.
Additional notes: if the motherboard is in windows or booted to an os already. it will work normally with a USB device (kb mouse and etc) it will have a pop-up in windows of USB device over current but all USB devices plugged to it works.
Will try with a different bios chip but I doubt it will fix the problem (it did not fix the problem)
I have removed all of the esd ic for USB 3.0 and 2.0
I measured all of the data lines and 5v usb voltage lines there are no shorts
all of the USB ports have no damage
Clearing the bios using the jumper wont help.
it is still showing USB overcurrent device
the only temporary fix I've tried and worked so far is flashing the bios
and the error is gone
but when you start the motherboard with a USB device still attached
the USB over current device error is back. the bios needs to be externally flashed again
if you only plug a ps/2 device it is fine.
if you restart it without a USB device the USB over current device error wont show.
All of the voltages of USB ports while the motherboard is running is normal 4.950v - 5.080v
it only triggers when starting up the motherboard when a USB device is plugged. and will stay stuck on that state unless the bios gets reflashed
the only odd thing i found while checking the resistances of the USB ports are the USB 3.0 port USB3_E2_5 has a different value of resistance (6.88k ohms) on
its first pin (5v) although this might be happening since it is connected to O3U3 ( POWER SW. NCT3520W-H15 MSOP-8)
other than that all of the USB port 2.0 measured are in 5.4k ohms above for data lines and 1kilo ohms and rising for the rest of the USB port voltage pins
USB port 3.0 primary data lines measured 11.8k ohms to 12.5k ohms
except for the one mentioned above
I have no idea where to check now since there are no shorts and i don't know if there is a problem with the pch but i am hoping that is not.
Additional notes: if the motherboard is in windows or booted to an os already. it will work normally with a USB device (kb mouse and etc) it will have a pop-up in windows of USB device over current but all USB devices plugged to it works.
Will try with a different bios chip but I doubt it will fix the problem (it did not fix the problem)
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