Hello there. I recently got the 3DS of my fiances sister to do a nand mod. I installed everything correctly, dumped the nand, unsoldered my work and tried to boot it up. But it just flashed the bottom screen when powering it on, then it suddenly shutted off with a popping sound. When I put the 3DS to sleep mode before it powered off by itself and then opened it up again, I could see the content of the bottom screen for half a second as if nothing was defective, well except that it would make that popping sound and it'd shut off again. I read somewhere that the ribbon cables to the top half could be damaged, so I ordered a new screen and a new sound ribbon cable, installed them and tried to boot that fucker again - but this time it'll just turn off in about a second. ... So, anyone here has an idea what's wrong with it? I can't check specific parts against my own 3DS since I gave it to her, as long as I have hers and I'm not going to see her for a while.