Vizio 39" horizontal lines

[JRyan]

Found yet another TV by the road that has lines across the whole screen. What is causing this?

[nomoresonys]

Have had one with a bad tcon present like that, also one with a bad tab bond which I shimmed to "fix"

[JRyan]

So I noticed a buzzing noise coming from the yellow part in the pic. What is this and is it the cause of the lines? This model has the main and power board together and no tcon.

[nomoresonys]

Transformer, check the solder joints on that and the rest of the solder joints on the board, can search images for bad/cracked/cold solder joints if needed.

[JRyan]

Transformer, check the solder joints on that and the rest of the solder joints on the board, can search images for bad/cracked/cold solder joints if needed.

Edit:
Ok i will look closely. This TV only has this one board so is the buzzing the cause of the lines?

Solder seems to have worked its way where the second pin in attached pic is disconnected. How in the world do i solder that?

[nomoresonys]

That one is suppose to be like that.

[JRyan]

I don't really see any bad solder on the board so i was wondering what i can check next? The board is the tcon/ps/main all in one.

[nomoresonys]

And you took the board out and checked all the solder joints? examples of bad joints: https://www.google.com/search?client...h=599&dpr=1.09

[JRyan]

I ended up getting another board but unfortunately the lines remained. The buffer board has an issue i can't fix.

[nomoresonys]

This may be the solution: https://www.youtube.com/watch?v=SbGAkRgaZhs&t=8s Not sure, maybe this won't work if you only have one cable from mainboard to driver board.

[nomoresonys]

Or it could be bad/loose tab bond or bad/damaged/dirty flat cable, can clean with isopropyl alcohol or pencil eraser, not too vigorously they can be delicate. May be a faulty component on driver board, did the buzzing go away with replacement mainboard?