Black finger across the screen to the bottom only in locked mode - retina 2014

Mine is a MacBook Pro (retina, 15 inches, mi 2014) 2.2 GHz with integrated display. When I opened the laptop this morning, I was welcomed by a screen locked and noticed a black spot on the lower part of the screen. My heart sank for a moment, but when I logged in, I did not notice the finger any longer.

I see the black spot that looks like an ink spot (see photo) when I get back to screen locked again. What is an LCD failure or is there something else going on? If it's an LCD has failed, why not see the problem when it is unlocked? How to fix? Thanks for any help.

Notice the black spot. The white point at the bottom left of the screen above is just the cursor hidden.

No stain when unlocked can be exceeded.

Could be a hardware failure.  If you bought AppleCare, you have 3 years warranty on the material and can diagnose the Genius Bar it repair free of charge - it is reproducible, so you can show them.

Tags: Notebooks

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