It didn't help. What else can I do?

What do you mean by a replacement ? And I cant go to diagnostic because I can't reach to the modem

The wifi still hangs. Any suggestions?

Will try. What is the meaning of disabling that? Is it important?

I tried it. I put Google DNS servers but I still get the disconnections. It thappens both on the wireless and the wired connection.

I have attached a screenshot of the status page. It stays the same when it disconnects. It does reconnect normally? It can happen every couple of minutes or every hour. Depends. Firmware version:...