Note 9 screen decolorisation, flickering lines on screen and overheating

[Baqi1]

Since one month I have been experiencing problem with my samsung  note 9. The screen becomes yellow usually when I press power button and then after leaving phone idle for few minutes if becomes normal. Since past few days, the screen decolourisation has become constant and poor resolution. It also shows lines on screen. What should  I do?

[TessM]

Hey @Baqi1 ,

before providing you with the next steps, can you confirm if the phone is presenting any damage at all? If not, would you be able to run the following Hardware Test to check if there is an issue with the display? To do this you just need to follow these steps: 

• Dial *#0*#.
• Select in turn Red, Green, and Blue from along the top row.
• Inspect the Home Screen on each option for any lines or discolouration.

[Baqi1]

when I follow above steps, it doesn't show lines but colours are still dull

[CLINTP]

I found its a processor overheating issue. Remove your phone out it's case and put it on an ice pack it'll work perfect until the ice pack is warmed up.

[SolidMinion]

We can't keep bringing ice pack out for work right?  

For my case, the phone was cooled for few hours, but after i power on and use for less than 30 mins, the yellowish issue came.... Sigh..