y las instrucciones de carga del bootloader (en ingles):

Appendix:

Maybe it’s necessary that you have to update Bootloader before you want to
update software. This update must be done before you want to update software.
Follow the steps:
1. Connect box to PC as described above and start SERIALTRAN38.
2. Load Bootloader to SERIALTRAN38. For that you have to change filetyp to
URT typ and choose the Bootloader.
3. Start Updateprocess by pressing Transfer Button
After the update of Bootloaders you can go on with updating software of box (as
described above).

OJO: en el programa de carga hay q indicar q cargue un URT y NO un dat.

Un saludo.