This specific firmware is for 3840x2160 (4K). Do not use it on 1080p screens.
Release the button when the LED starts blinking rapidly or an "Upgrading" bar appears on the screen. Download MSD6586 T8E2 3840x2160 Innova rar
Open your TV back panel to confirm the silk-screened text says MSD6586-T8E2 . This specific firmware is for 3840x2160 (4K)
Firmware for these boards is typically hosted on technician forums rather than official consumer sites. Search for the specific file name: all_upgrade_msd6586_8G_1G_refXX.bin (or similar). Trusted Sources: Download MSD6586 T8E2 3840x2160 Innova rar
Try a smaller USB drive (USB 2.0 is more reliable than 3.0 for flashing).
⚡ Flashing firmware carries a risk of permanent hardware damage. Always back up your original SPI Flash data if you have a programmer like the RT809F.