i was using several rigs to mine etherium for last few years but suddenly all stopped. I havent checked back yet but just wanted to check here since POS is started, did POW stopped yet? If so, I dont wanna waste time troubleshooting. If not stopped (pow), when it is going to be stopped?
POW is still ongoing but ETH also started to push out its POS phase. However we will still have POW for the next 1.5-2 years or so. Most likely reason why your rigs aren't working is because you are either using Claymore which stopped on a recent epoch due to the developer retiring, or you got 4GB GPUs which cannot mine eth anymore due to the growing dag.
So if you got 8GB GPUs switch to like PhoenixMiner and should be easy to set up, similar to Claymore in alot of ways. If you got an 4GB cards then there is a special trick you can do to make them mine again. Use a software called lolminer and it will mine but at a reduced speed. Mine are mining at 20MHS while before the 4GB DAG they were mining at 30MHs. You can mine this way for another month before the speed gets very slow and not worth the hassle to mine on 4GB cards.