Usually multiple white spots on a TV screen are an issue with the back lights. There could also be damage to the panel if the TV was dropped or jarred. You could always try to clean and reseat the ribbon cables going to and from the panel in the back of the TV. These are usually connected to the main board or the T-con board, but most likely there is an issue with the back light strips.
I have 10 white spots on the screen in various places, what is this symptom, how is it fixed
Usually multiple white spots on a TV screen are an issue with the back lights. There could also be damage to the panel if the TV was dropped or jarred. You could always try to clean and reseat the ribbon cables going to and from the panel in the back of the TV. These are usually connected to the main board or the T-con board, but most likely there is an issue with the back light strips.