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: Unzip the package on your PC. You should see a binary file (often named allupgrade_... .bin or similar).
Once you have downloaded the .zip or .tar file, follow these steps to flash the firmware via USB: Download S512 PC821(1920 1080)(DEXP) zip
Do you have the of your DEXP TV or the panel sticker info to ensure this is the exact file you need? Complete TP HV553 PC821 Software Setup Instructions : Unzip the package on your PC
Press and on the TV panel (not the remote). including those with S512 boards.
: Frequently lists dump files and USB firmware for various DEXP models, including those with S512 boards.
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