I have an antminer s4 that is generating the following flaws and I would like them to help me solve them

1. some times when mining down from 2Th to 1100GH and other times mine 2.5TH the mine graph that appears in F2pool is very unstable will be the antminer or will be the pool

2. when there is no internet service the antminer starts to ring to alert that it is not connected to the network but then when the connection is restored it does not connect automatically I have to turn it off and turn it on so that it is connected that is normal?


Thanks, I hope you can help me.