Need help with my second hand Gameshell

I bought a gameshell used and it would not load anything, even cave story and when I tried it would hit me with the load screen then a quick black screen then back to the home screen. Every time. So from what I found on here I figured I should reflash my sd and update everything. I reflashed through etcher but now it’s just stuck on the boot up screen. I really have no clue what I’m doing so I could have just missed a tiny step… Am I supposed to extract something? I’m just kind of at a loss and any help would be appreciated greatly.

Hmm I think I remember something about etcher having a bug, what OS are you using?

EDIT: Yep, check this thread

You could try win32diskimager I have good results with it.