Ok so I installed custom firmware on my 3ds

And it was working fine but after a while an update came for the 3ds and one also came for the cfw but I updated the 3ds and after I updated it I couldn’t enter games or anything because it would shut off my device and I got tired of that so I tried deleting it off my ds through the godmode9 I think but it wouldn’t delete so I got impatient so I took off the sd card and deleted all the info and that was a huge mistake because now it doesn’t show the screen or the bottom screen but the lights do turn on any way of fixing this or did I permanently ruin my ds?