For some reason my Helios64 took a nose dive today, so I hit the reset button and it wouldn't boot up. Plugged in to the serial console and this came out:
I'm guessing the relevant lines are
libfdt fdt_check_header(): FDT_ERR_BADMAGIC
No FDT memory address configured. Please configure
the FDT address via "fdt addr <address>" command.
ERROR: Did not find a cmdline Flattened Device Tree
Loading Ramdisk to f4f09000, end f5ee4ba