The is a common Android-based smart TV mainboard (often the TP.MS338.PB819

The "512M" refers to attached to the SoC. Why does this matter for updates?

Completely unplug the power cable of the television or mainboard from the wall outlet.

CVTE manufactures boards for hundreds of different TV models. A firmware for one TV will brick (destroy) another TV if they use different LCD panels.

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: alladdress.pkg , MstarUpgrade.bin , or .upd recovery packages Step-by-Step USB Firmware Update Guide

: The standby light (usually red/blue) should start flashing rapidly, indicating the update is in progress. Do not turn off the power