Hi, i have been using a dual boot retropie/librelec build and it was doing great. But today i was messing around following this tutorial https://www.youtube.com/watch?v=EvA_Wfa8Bh0
and when i changed the memory split (in the video around minute 6) it prompted to restart, so i did. But at the moment of the reboot it got stuck on black screen with one raspberry and the white bar like i could write but nothing happens, can't write and doesn't move past this point. SD seems to be fine but i don't know what can i do to solve this problem and hope someone could help.