Antminer l7 restarting

Hi I have a antminer l7 in facing issue that my miner keeps restarting and in my Web interface I don’t see my miner run time more then 30 mins where as other miners are running for hours

Have you checked your power supply? When the power output fluctuates wildly, it will cause the hash board to restart. This is usually not obvious, and you can try replacing the power supply to fix the problem. Or when the control board is abnormal, it will also cause the miner to restart. Generally, you can restore the factory settings or try to swipe the card; if not, you need to repair the control board or replace it with a new control board. The network is unstable, and there is a certain probability that the miners will restart.You can try to replace the network cable or network cable connector for local inspection.