Black curve spot on side of iMac screen

[tibbyhu]

I've just noticed yesterday.
the left side of my screen has a black curved spot.
nothing happened with my mac. not been hit or anything.

anyone got an idea what could cause this and how to fix it?
it's a 2011 iMac no apple care.

 

[tibbyhu]

Actually I've got a better picture.
The screen isn't completely black, just darker on the side.
I've attached a picture of the mouse on the dark area.

Is this looks like a screen or something else? Cable? Video Card?

Thanks!

 

[Kyle-K]

Edit: Missed the fact that it's a 2011 model.

 

[tibbyhu]

Do you have any idea how to fix it?
I really dont want to spend another 600 USD for screen replacement.

 

[Kyle-K]

What's happened to the pictures? Would love another look now I realise you have the 2011 model.

 

[tibbyhu]

I don't think it's a burned issue...
Especially, because I had nothing round on that part of the screen that could burn into, and if I turn the screen off for overnight and back on, the dark spot is exactly on the same place.

I've took another picture of it in a different angle, and that makes me think your first comment, that the screen is somehow separating from the glass or so?
If I Look it on the side, this is how it looks like:

 

[Kyle-K]

Still no picture showing for me?

I don't think it's a burned issue... Especially, because I had nothing round on that part of the screen that could burn into, and if I turn the screen off for overnight and back on, the dark spot is exactly on the same place.

As I couldn't confirm this issue without re-seeing the pictures I quickly remove that responds. Regarding the "display burn in pixel retention issue" which I removed it would continue to be there after having the machine off.

Anyway that issue is less likely and is one of the reasons I removed it from my response quickly afterwards.

That makes me think your first comment, that the screen is somehow separating from the glass or so?

The issue on thinking of can't happen on your generation of iMac as your display and the front glass a separate. 2012-13 models the glass and display are one and I've seen some issues with the lamination process.

That's why I removed it the moment I realise you had a 2011 model.

 

[NYhoosier]

This is possibly the same issue as seen on this display. The link to the fix comes towards the end.

https://forums.macrumors.com/threads/1741524/

 

[Kyle-K]

This is possibly the same issue as seen on this display. The link to the fix comes towards the end.

Wow pictures definitely look similar.