Plug the TV back in. Some models require you to hold the on the TV panel until the update light starts flashing.
Often found in the 75W (REF75) variant for 32-inch displays. Where to Download Download SK508 PB801 1366x768 REF75 Skyline part09 rar
Installing incorrect firmware can permanently brick your motherboard. Always verify that your board model matches TP.SK508.PB801 before proceeding. Plug the TV back in