. , as incorrect firmware can brick your device.
To help find the right version, what is listed on your device status page, and who is your internet service provider ? Share public link hg8245w56t firmware link
Because ONTs are provisioned directly by telecommunication companies, your ISP is the most reliable source for the correct firmware. hg8245w56t firmware link
This is the recommended method for most users as it is less prone to human error. hg8245w56t firmware link
Do NOT turn off the power. The device will reboot automatically. Troubleshooting: HG8245W5-6T Firmware Issues