If your TV still powers on but has software bugs, it is safer to use the official update method:
Loading a dump file requires a specialized hardware programmer (like the RT809F or RT809H). Incorrect firmware can permanently damage the board. Official Firmware Update Alternative Download VST59 PA506 Panasonic 24D400DX Dump rar
24-inch (60 cm) HD Ready LED (1366 x 768 resolution). Ports: 2 x HDMI, 2 x USB. Finding the "Dump" File If your TV still powers on but has
Go to Menu > Help > System Information to see your current version. Download VST59 PA506 Panasonic 24D400DX Dump rar