Today i replaced the game slot and made the hardmod to my old 3ds. When i tried to switch on again the console (with the dump nand cable plugged in + the sd adapter) after the hardmod and with the new card slot it went to the classic blue screen, so i turned it off thinking everything went fine. Then i tried to switch it on again, this time without the cable because i wanted to test the new game slot, but after few seconds the 3ds died. Now when i press the power button the blue led turns on for 1-2 seconds and then the console turns back off, sometimes it doesn't even appear the blue light of the led, it just doesn't turn on. I already tried to re-insert all the ribbon cables but nothing changed. Any ideas of what this could be? I can provide photos of the motherboard. I'm not an expert, but i would really like to fix this console, thanks in advance!