Sony Bravia mark on screen

[magotan42]

I've recently purchased a SONY - BRAVIA KD65XF9005 65" Smart 4K Ultra HD HDR LED TV and noticed a strange mark on the screen.  It is approximately half a metre wide and looks like a smudge on the screen.  We have tried to wipe it off with a micro fibre cloth but it does not seem to be on the outside.   Is this normal and will it go away? 

[IamNic]

Hello @magotan42,

I would try to gently heat the part of the screen with a hair dryer to see if it goes away.

Was it already there when you bought the TV?

- Nic

[magotan42]

Hi @IamNic,

Thanks for the suggestion. 

The mark was there on the day we took it out of the box 😕 which was a couple of days ago.  You can't see it when the TV is on but I am worried there is fault behind the screen that is causing this mark to appear.

[LightFoot]

Hi @magotan42   I wouldn’t hesitate, I would get it replaced.

[IamNic]

Hello @magotan42,

on a second thought replacing it would be best as suggested by @LightFoot.

To explain my suggestion very briefly - to me it looks like residue from some "cleaning" subtance - probably used to clean the glass before assembly.

By heating it up (carefully and slowly) you can see if said subtance evaporates.

- Nic