Hi Lucía Bonomo,
Thank you for reaching out to Microsoft Q&A forum. I understand how frustrating it is when a Surface Laptop won’t turn on, especially when you rely on it every day.
Please follow the Q&A Assist guidance above to start the replacement process online. If you prefer face‑to‑face help, Microsoft also offers in‑person support at select service centers or Authorized Service Providers.
I hope this helps, and that your device will be back up and running soon.
Thank you for your patience and understanding.
Best regards.