Black Screen/unresponsive iMac Desktop

My iMac desktop randomly shuts down. I'll go back to find the power still on (can feel the motor running by touch) but complete black screen. If I press a key, move the mouse or press the power button nothing happens. The only way to get any response is to disconnect the power cord and plug back in. After that the power button becomes responsive and it'll reboot.

This is happening continuously. This all started on 1/1/2022, prior to the new year I had never had this happen.

I tried to update to Monterey to see if it would fix the issue but problem persists.