Just turned off

[Grace_Maple]

1. Uhhhh I’m not sure what just happened but I’m worried. I built my pc about a week ago has been working perfectly well and dandy. I just turned it back on from sleep mode and was using it for ~10 minutes and transferring files from a drive from my old pc (asseto corsa files) while also trying to fix the Xbox app. It just randomly turned off black screens. While the rgb and fans were still running. So I left it for a bit to see if it would restart on its own. It didn’t so I tried turning it on and off again and it’s reverted back to its original rainbow rgb and isn’t giving any output or any output to keyboard lights

   Any help 
2. I didn’t touch anything of the pc like I said I was just using it