3DS won't turn on. No blue light, but charges.

I just happened to fix my old 3DS, the top screen used to not work. I fixed it by reseating the top screen cable and I re-assembled it and it seemed to work fine up until a few hours ago when I got some artifacts on my screen for a split second, heard a pop noise and my system turned off. I took it apart and checked the fuses, the cables, everything seems fine. Checked F1 and F2 fuses and they seem to be okay too. I left it for a couple hours to charge, even seemed to charge the battery to full, so no issues there, but the console still didn't turn on and I'm out of ideas. Can anyone help?