Need help with Avalon 1166 Pro 81T

I'm running into issues with one of my Avalon miners. All my miners are connected to the same pool, but this one keeps showing Net Fail. I've already swapped out the PSU and Control Board, but the issue is still there. I've also gone through the wiring and confirmed the firmware is up to date. Can anyone take a look at the log and offer some advice on what's going wrong? Sorry if this is posted in the wrong spot. {'STATUS':[{'STATUS':'S','When':908,'Code':11,'Msg':'Summary','Description':'cgminer 4.11.1'}],'SUMMARY':[{'Elapsed':885,'MHS av':0.00,'MHS 30s':0.00,'MHS 1m':0.00,'MHS 5m':0.00,'MHS 15m':0.00,'Found Blocks':0,'Getworks':35,'Accepted':0,'Rejected':0,'Hardware Errors':0,'Utility':0.00,'Discarded':7713701,'Stale':0,'Get Failures':1,'Local Work':5,'Remote Failures':0,'Network Blocks':2,'Total MH':0.0000,'Work Utility':0.00,'Difficulty Accepted':0.00000000,'Difficulty Rejected':0.00000000,'Difficulty Stale':0.00000000,'Best Share':0,'Device Hardware%':0.0000,'Device Rejected%':0.0000,'Pool Rejected%':0.0000,'Pool Stale%':0.0000,'Last getwork':0}]}

You should use proper formatting for readability. I see multiple errors here. You should first check the status of the MM board of the miner, here it shows ECHU[1 131073 1] ECMM[1], which means that the MM board may have problems or poor contact with the hash board. And check the hashboard in the middle, because here it shows HASHS[0 1 0] . It is also necessary to check whether the miner uses a static IP and whether the DNS configuration is correct. If the DNS configuration is incorrect, the miner cannot access the mining pool. You can check out more troubleshooting tips for Avalonminer here. https://www.zeusbtc.com/articles/asic-miner-troubleshooting/1677-avalon-a10-series-troubleshooting-guide

There are many issues according to your logs not only overheating it also has problems connecting to the pool due to high netfail and bootby also like the above said the middle hashboard is abnormal or it might have connection problems you can try to clean terminals and replug them first but if it didn't work you'll need to replace it.