If your TV is a brand like Noblex or JVC from the Latin American market, this forum is excellent, though it often requires a paid membership or "credits" to download. Before You Flash: A Quick Checklist
Can often be accessed by pressing Source or Menu followed by a numeric code (commonly 2580 or 1147 on similar boards) to adjust screen parameters. Common Fixes: hk.t.rt2851v09 firmware
Android 9.0 or Android 11, depending on the firmware version. 🛠️ Firmware & Software If your TV is a brand like Noblex
Plug the USB into the TV, hold the power button on the remote or TV, and plug in the power cord. this forum is excellent