This allows you to flash the .rar (once extracted) without needing to access the on-screen service menu.

LVDS (1 channel, 8-bit) via a 30-pin connector. Refresh Rate: 60Hz.

If the TV is "bricked" (won't turn on), the board automatically looks for a file named allupgrade_xxx.bin (or similar) on a FAT32 USB drive when powered on.