HD51 4K Mutant hd51


I have a Mutant hd51 and it decided not to boot so I've been trying to flash openatv on it the last couple of days but instead of "flashing", I just get "no partition".
I've used both my usual usbs and a new one.
I've unplugged the internal hard drive and all cables as seen in another post but still "no partition" message.
I am unable to flash openpli though, but don't like it and neither does my wife.
Is there a way to flash openatv from ssh or something I could do?