So, I finally got around to upgrading my console to 4.1U, which went REAL smooth. I then put some channels on the SD card, but they wouldn't launch, so I went onto dopmii and upgraded a couple of IOSs. Now, the games on the SD work, but now if I try to launch Homebrew Channel or USB Loader, my system freezes on a black screen. Removing the SD doesn't help. Can anyone help me?