Do you have the of the TV or the mainboard silkscreen number (e.g., TP.MS358...) to help narrow down the search for the full set of files?
Installing the wrong firmware or an incomplete archive can (render it unbootable). Ensure you are matching the board number printed on the green PCB inside your TV, not just the model number on the back of the case.
A major database for TV repair files (requires a technical test to register).