@Pablop1968
Sorry to tell you that we only provide English Service for Global users, so we tried to translate your question into English and continue to help you. Wish your understanding.
What is the model number of your extender? Please tell us the led status of the extender as well.
Please use the main router's wifi password to configure this extender and you can tell us the model number of the main router.
Have a good day.