try something called a cold flash

# If warm flashing fails, try to switch off the power from the Maemo device, remove the USB cable and try again from the beginning.
# If cold flashing fails, try to warm flash the Maemo device first using the same FIASCO image. After that try cold flashing again. NB cold flashing is rarely ever needed and not recommended for end users. It's meant only to recover from a defect or outdated NOLO bootloader.