This question already has an answer here:
This question duplicated with this. I asked for answer this question. Because I cannot answer the original question because I don't have 10 reputations.
After hard reset I've encountered with:
BusyBox v1.18.5 (Ubuntu 1:1.18.5-1ubuntu4) built-in shell (ash) Enter 'help' for a list of built-in commands. (initramfs)