On some TV's they have Samsung Service Menu.
Have you tried that? It used to be hidden I'm not sure if that is still the case.
Here is a excerpt
To access the hidden menu on a Samsung TV, follow these steps:
1. Turn on your Samsung TV and make sure it is connected to a stable internet connection.
2. On your TV remote, press the “Menu” button to open the main menu.
3. Navigate to “Settings” and select it using the center button on the remote.
4. Scroll down and select “Support” or “Support & Contact” from the menu options.
5. Next, scroll down and select “Self Diagnosis” or “About This TV.”
6. Now, press the following buttons on your remote in quick succession: “Mute,” “1,” “8,” “2,” and “Power.” This combination will bring up the hidden menu on your Samsung TV.
7. On the hidden menu, you can navigate using the up and down arrow keys on your remote. To select an option, press the center button.
8. Within the hidden menu, you will find various advanced settings and options that are not accessible through the regular menu.
From this website
https://www.devicemag.com/samsung-service-menu/