I have been using retropie for a while, But recently I went to do a fresh install of the entire thing and there seems to be a problem where I launch a Rom and it goes black displays normal text then proceeds to return to the choose rom selection. this occurs on all the emulators as far as I can find.
To be Clear: Reformated a 32gb card, Mount Pi 2 v3.2.1 Image, Insert into Pi 2 configure controller.
That’s all I have done. I am not sure how the problem would be from my end.
I Also try to test Cavestory from the ports and it does not work either.
Did you upgrade to a different version of retropie? I was thinking that maybe if you upgraded to a newer version with updated emulators probably you have an obsolete romset and that’s the reason why they are not launching. If not, I would try re downloading the img file and do another fresh new install.