tried that, same result
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here is a detailed version of what happened,
i got my new 3ds, then i extracted smea's homebrew starter pack to the root of my sd.
then i used browserhax to launch hb launcher, when i arrived at the menuhax manager, i chose to install, it was successful, then i configured it
to use the a button to load th hb launcher. Afterwards, i manually booted menuhax twice successfully, then i tried to install menuhax with a custom theme, so
I put a custom theme in the right directory and i chose in the menuhax manager, "install with custom theme" i chose that and then it successfully installed with the body_lz.bin(i think thats the name) then it froze at installing the bgm file, for about 12 minutes. So i thought a reboot would fix it, so then i held the power button to turn of my 3ds. when i tried to turn it on, the blue light turned on, the screens didn't even turn on with light, it just stood there with no display, then i tried taking out the battery, the sd card, the gamecard in and out, but nothing worked.