. Some models begin updating automatically, while others may require you to hold the Power button on the TV panel until the update indicator appears.
: A reliable repository for TV firmware. You can search for the HK.T.RT2938P639 board specifically on the KenotronTV Files Section . Download RT2938P639 1366x768 ASANO part2 rar
: This site often hosts USB-updateable firmware versions for this specific mainboard. You can check the HK.T.RT2938P639 FHD USB page . . Some models begin updating automatically