I have an old 2ds running sysnand cfw on the latest luma, and it won't boot up. I was playing super smash bros 3ds and flipped the sleep switch, and when I flipped the switch, the screen lit up, but it was black. So I powered it off and back on, and I still got the black screen. I tried it with all combinations of cartridge and sd card in/out and rebooting it, but nothing worked. So I restored the nand and it worked fine... until the exact same thing happened again. In the same game under the same circumstances. I am wondering if anyone here knows what this is, or how to fix it.