If the box is stuck on the logo screen for more than 10 minutes, try a hard reset.
Power off the box and look at the label on the bottom. You are looking for: huawei stb ec6108v9 firmware update install
If your EC6108V9 shows no signs of life (black screen, blinking red light), you need a serial flash. This is an advanced method requiring a USB-to-TTL serial adapter (e.g., PL2303 or CH340). If the box is stuck on the logo