Firmware for these generic boards is often hosted on technician forums and YouTube tutorial descriptions. You can find related software and installation guides at the following locations:
The YouTube video Android TV Firmware Installation TP.MS358.PB801 provides a full tutorial and a Telegram download link in its description. Download MS358 PB801 1366x768 512M USB part3 rar
Sites like Electronics-Tricks frequently host various versions of this firmware for different panel resolutions. Hardware Repositories: Platforms like Dip Electronics Lab Firmware for these generic boards is often hosted
Insert the USB into the TV's port while it is off. Turn the power on; the standby light should blink rapidly, indicating the update is in progress. Installing the wrong resolution firmware can result in
Ensure you are using the correct firmware for your exact screen resolution (1366x768). Installing the wrong resolution firmware can result in a distorted or black screen.
Place the extracted firmware file (usually named allupgrade_ms358.bin or similar) onto the root directory of the USB.
Download all parts (Part 1, Part 2, etc.) and extract them using WinRAR or 7-Zip. You must have all parts in the same folder for the extraction to work.