so far I'm leaning towards the fault of the provider due to the low signal level. worked for more than 2 years without any complaints, a couple of times I had to turn it off from the outlet. three days ago it began to fail, access to the Internet is constantly lost, it cuts off the connection. The test speed shows less than 1Mbps, it used to show the same as with a direct connection of 30-50Mbps. firmware upgrades and factory reset helped to achieve stability, but the speed remained slow. in continuation. Then the Internet disappeared completely. even with a direct cable connection, without a router, it began to write "Network cable is not connected." found a solution 1. insert the Internet cable into the LAN port, and connect the other LAN and WAN of the router with the one that came with the kit. 2. Insert the Internet cable into the LAN port, and connect the other LAN and WAN of the laptop with the one that came with the kit.
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