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

: Once the update reaches 100%, the TV may restart automatically or the LED will stop blinking. Unplug the USB drive and power cycle the TV.

The file you're looking for, , is a firmware update package for DEXP TVs using the TP.S512.PC821

: This site hosts official manufacturer firmware specifically for the TP.S512.PC821

board. Note that the archive often contains multiple files for different serial number ranges and panel types (e.g., LSC480HF01-W).

: A common alternative source for firmware dumps when direct site links are broken. Installation Steps