TSW200 switch entering error state when connecting specific device [SOLUTION]

[Roman]

I figured that I probably should provide here a link to the other thread with the description of the problem, so that a link appears in that former thread directing to this new thread with a solution described in the above post.

TSW200 switch entering error state when connecting specific device

I am a happy owner of a TSW200 switch in a low-traffic and low-power network. It is fast, requires no configuration, powers several devices in the network, doesn’t break others, consumes little, and stays cool. That switch has recently refused to accept a computer into the network with an Azuz Prime Z270-K motherboard and an onboard Intel I219-V Gigabit LAN. When the Ethernet cable is connected, the switch stops all traffic. All its LEDs go dark. Then, they start blinking in unison with consist…