Removing the SD card is a temporary fix, as themes could probably break it again.
Try removing it, turning it on, re-insert it while the Home Menu is on-screen, and use homebrew somehow (ironhax, tubehax, etc.). Install a single theme with CHMM2. If that doesn't work, tell us and I'll get an alternate method.
Try removing it, turning it on, re-insert it while the Home Menu is on-screen, and use homebrew somehow (ironhax, tubehax, etc.). Install a single theme with CHMM2. If that doesn't work, tell us and I'll get an alternate method.











