Hi, i have a new 3ds model 2015, when i try to downgrade to FW 9.2 and reboot not show any video on any of two screens. I think i bricked, also i dont do it a backup, so, i searched that doing a hardmod it can be restore, but need a backup nand.bin, but i dont doing it, cause the console has the original systema without mod. My question is: Do i need to buy it a new mainboard? or use a nand.bin of other new 3ds? to restore my console. So, i encourage to do the hardmode and well i soldier every wired on every part of the circuit and every pin of the sdcard. But when i connected to sdreader (without connect to usb PC), I get this error and only turn on the bottom screen and the up screen remains black: BOOTROM 8046 ERRCODE: 00F800FE 00000000 00000000 00000200 00000000 Sorry for my bad english, but im spanish person. This are the pictures of my 3ds. So, if a good option to buy a mainboard? On aliexpress are on $58, i dont spend on shipping. Im considering if i srewed whit this, buy it and replaced. Could i have problem whitout another board?.. For your Information I have a degree on electronic. By the way, the wired cables are enameled and dont make contact each.