HK.T.RT2843P639 (often associated with the closely related HK.T.RT2842P639
: Some users noted that the "dimming" issue where HDR content looked too dark has been calibrated, resulting in better peak brightness. Snappier UI hktrt2843p639 firmware link
Or look for similar strings on the board itself (e.g., RT2843 , P639 ). hktrt2843p639 firmware link
on your TV to ensure you have the right version of this firmware? hktrt2843p639 firmware link
Plug the TV back into the power while continuing to hold the button. Wait for Completion : The standby light should begin blinking rapidly. Do