Before you start the Acer National Service Center, please try to clarify your questions in the product manual or go to acer.com.br in the SUPPORT menu. If your question is not clarified or require specialized assistance, please go to our Chat at at acer.com.br in the POST SALE SUPPORT menu. Or call Acer 0800-762-2237 National Service Center and talk to one of our technicians. Service time is Monday to Saturday 8:00 - 10:00 pm (Brasilia time), and Sunday 10:00 - 6:00 pm excluding holidays