@doubleup_dan said in Black screen after overclock with argon40 case:

So I have installed a damasos nostalgia trip 200gb and my pi4 4gb is in an Argone40 case and it has been mostly running fine.

We don't support 3rd party images - it's clearly stated in https://retropie.org.uk/forum/topic/3/read-this-first. Start with the image from retropie.org.uk/download if you wish to get support here in the forums.