MOBO: H310 v3 r2 RAM: 8+16gb CPU: i5 9400f GPU: 1650 super
It boots fine when ethernet cable is disconnected. However, it would freeze whenever I plug it in then would be stuck in a loop without POST when turned back on.
Event viewer logged a critical event (Event 41, Kernel-Power)
Also, for some reason, when I plugged my KB in the USB 2.0 at the back near the ethernet port, it would light up but would not work. However, when I tried it again using the wireless adapter of the KB in the same port, suddenly it would work.
Are You using some STP, SFTP or other cables like these? Those cables tend to have a connector with metal on it. It can be the cause of that.