Share your experience!
Tela está com uma mancha no canto superior esquerdo
Screen has a smudge in the upper left corner
-GT
Hi @02denovembro, welcome to our forum!
I have translated your question to English as this is an International forum.
I'm not quite sure that I understand exactly what kind of behaviour you are experiencing with your screen, could you please elaborate a bit?
Thank you.
Have the same trouble in a middle of left side of the screen 1 cm yellow smudge. So, it's difficult to describe the reason why, but it does not mean physically crashed. It's just like touching something from inside. What's that mean?
Hi @XA1ent, sorry to hear about this. 
Is this smudge always visible, or does it only occur in certain applications? You can do the display test that is found in Settings > Support > Tests > Display and see if you are able to see the yellow smudge here.
Should it also be visible in this test, there seems to be a defect with your display and I would recommend that you get in touch with your Local support team, so they can arrange a repair for you.
Keep me posted! 
Hi.
Yes, it's always visible. Bigger and bigger in a day. So, I have two yellow smudges as result.
Thanks for your answer. I'll try to get my regional customers support.
Hi again @XA1ent, that does not sound good at all and it's time for a technician to examine your device!
I hope that everything will go smoothly and have a nice weekend!
I hope so. Thanks
Появились жёлтые пятна в верхнем левом углу экрана.
Как можно решить этот вопрос?
Yellow spots appeared in the upper left corner of the screen.
How can this issue be resolved?
gt
It's a screen burn. I had it from less than a year of using my Xa1. The fix I did was to replace my screen and making sure I don't put my screen brightness to the highest level and setting auto screen off after 15 seconds and use a screen saver. Also activate screen brightness so that the phone optimizes brightness to the right level.
Hey.
The screen changes every two months. 85% brightness
In a word, it does not help that one and in general, as for me, it is simply not acceptable.
You can even talk about it and you can turn it on))