: With the TV off, insert the USB. Hold the physical power button on the TV and plug in the power cord. Release the button when the standby LED starts flashing rapidly, indicating the update has started.
To download the firmware for the smart TV mainboard with a 1366x768 resolution and 1G/4G memory configuration, you can use technical repair forums that host BIOS and USB software dumps. Available Download Sources Download File HK.T.RT2831P588_1366x768_1G_4G_Pl...
: Place the firmware file in the root directory of the USB drive. : With the TV off, insert the USB