Official support for these "no-name" units is rare. Instead, users rely on repositories from the original board manufacturers or community forums:
This is the most common source for firmware for YT-series boards. You can often find files at file.xygala.com (User: Xyauto / Pass: 123456 ). yt9260-ver1.1 firmware
If your unit still boots, you can update via the system settings: Official support for these "no-name" units is rare
There are two primary ways to flash firmware to a YT9260-VER1.1 board depending on its state. 1. Standard USB Update (System Working) yt9260-ver1.1 firmware