Are you trying to using a programmer, or just looking to update the software via a USB stick?
The search for a "dump" or "bin" file for the LED TV, which uses the TP.VST59.PA506 motherboard, often refers to the raw firmware extracted directly from the TV's memory chip (EEPROM/Flash). This is typically used by technicians to repair TVs that won't turn on or are stuck on a logo. Device Specifications & Hardware Model Name: TH-24D400DX (2016 model). Motherboard: TP.VST59.PA506. Download VST59 PA506 Panasonic 24D400DX Dump rar
Visit the Panasonic Global TV Download Page and search for the model TH-24D400D/DX. Are you trying to using a programmer, or
You can find spare motherboards or technical files on sites like AndroidFixCell or LED LCD TV Spares . which uses the TP.VST59.PA506 motherboard