Hi guys I need to ask the community the following: For 2 days ago woke up to find that my IMac 2019 intel i9 crashed over the night and both of my external screens stoped working! I basically started then to Google about the issue both new usb-c adapters changed the cables nothing worked. That was the time when I decided to call Apple and after talking with them for 2 hours the decision was to upgrade to Big Sur. BIG MISTAKE!! The machine started lagging got lines on my screen and the external screens are still not working. Then I decided to erase the HDD and reinstall Big Sur. SECOND BIG MISTAKE!! It got even worse :( Then I decided to downgrade to the previous Catalina OS from a bootable USB. The machine is still lagging and the screens still not working. Then I decided to downgrade to Mojave the OS the machine came with, well still same lagging and screens not working :( Everytime I did the above solutions I did a clean install Now any of you amazing ppl can have more to add to my solutions? I got green light from Apple that Incan send the machine to one of there service place but my problem is that i live really remotes and I will be without a PC for like a month, that is why I am asking you ppl for more brainstorm maybe I can fix the problem without sending the machine to Apple?