Question about Panasonic TB-40S45AEZ

Hello Neptun3126. I have the solution! I phoned Panasonic today. Here are the instructions to solve the question. Use the remote control. Go into the settings. Then go to "Other settings". From there, go to the "Standby on-off mode" menu. Use the right arrow button to select "Last source" and confirm with OK. That's it, it works. Have fun.