need help blu engery x plus

son mess phone up it was rooted with king root problem after doing reset hard and soft it wont get past looking for software update but it is up in the background cause he can get in coming calls but cant get to rest of phone i tried droid manger iroot sptool mtktool but they wont see the phone weather its on or off but i can see and copy files from pc to sd and phone how can fix this thanks