Question Split screen problem

[Droehl]

RCA RTU6549
65” non smart tv.

Has split screen, with identical screens side by side.
I can’t find anything on the remote or settings about picture in picture.
Does anyone know what I could do to fix this?

https://pasteboard.co/INhUwMi.jpg

 

[hang-the-9]

This happened after what? Usually the cause is the wrong cable or screen being used when replacing something.

 

[Droehl]

This happened after what? Usually the cause is the wrong cable or screen being used when replacing something.

I replaced the main board in the tv. The replacement board has identical numbers as the old one except for manufacture date. Other than that it’s identical.

 

[hang-the-9]

I replaced the main board in the tv. The replacement board has identical numbers as the old one except for manufacture date. Other than that it’s identical.

Yep, thought something was done to the set, that split display does not just happen. Connection, cable, whatever you replaced is not right. As to exactly what, no way to tell for sure, did you check what was put in and re-seat cables?