Hi everyone.

I carelessly use pc3k to load this hard disk with another one's loader, ram and modules. Worse, the modules set is missing some files. Now I can't enter standard mode or even load loader/ram. If I try to load new loader, it enters busy mode, enter standard mode and hear knocking sond. I really think it's dead now but anyone knows how to fix this?

You have a great great chance to had start with a hard disk that could be - at that time - to be fixed.
But you have now a "situation"