The eGpu-Dock, the GPU and the mini PC could all be the cause.
Please send us a picture of SN on the bottom of the PC .
First, Please turn off the PC , unplug the power supply, and press the CMOS button (if no CMOS button, please put the pin in the CMOS pinhole and press it ) for about 10 seconds , restart the PC after ten minutes. Here is the tutorial https://mega.nz/file/XypwTISY#DVT0BsjOgiPkZ-drQaj88JH9Z7f7qpKGP2E3nMHW8ms or https://url.bee-link.cn/5FdW
Please uncheck the save energy in the device manager—universal serial bus controller–USB hub—properties–power management—uncheck “Allow the computer to turn off the device to save power”