Hello. The S9 began to disconnect from the pool after 1-2 hours of operation. The S9 itself works. What can be wrong?
Have you tried connecting to other pools to see if you get similar issues?
After that try a different router (often home broadband routers block mining), or connecting via a different network to see if you still have the same issue.
I tried on two different pools. F2p and Nicehash. Internet provider did not change. What pools will advise, where it is possible to test the work of miners?