Macbook Pro 2014 Screen delamination cause, a specific case that puts some light on that mystery?

[rin67630]

Hi I have got today a Macbook pro 15" 2014 with a bady delaminated screen and bloated batteries.
It is worth noting that the external case was absolutely pristine, not the tiniest scratch and the keyboard hat absolutely trace of wear.
Inside, it was full of dirt and fluffs, indicating a past intensive usage.
So that device has clearly been intensively used, but only as a desktop device, with closed lid and external keyboard/mouse/screen.

That brings me to the conclusion about the causes of the staingate on some devices and not on others.
Wear, scrubbing, finger sweat should here clearly not not have been the cause as a frequently proposed explanation for delaminating, but heat from working with a closed lid, surely...

 

[JPack]

Isn't it possible the previous owner used a hard shell case and keyboard cover?

Every MacBook I sell looks brand new until you check cycle count and SSD hours.

 

[rin67630]

Isn't it possible the previous owner used a hard shell case and keyboard cover?

Every MacBook I sell looks brand new until you check cycle count and SSD hours.

...have you ever used a hard shell case? A lot of dirt accumulates there.

 

[JPack]

...have you ever used a hard shell case? A lot of dirt accumulates there.

Yes, that why all my MacBooks look new. Dust can accumulate, but it never scratches. The only possibility of scratch is with the tabs on the case during installation.

 

[Fishrrman]

The display has a thin "sprayed-on" (particulate) coating.
It's somewhat on the fragile side, particularly on older models.

Because it's just sprayed on, cleaning -- or more correctly, OVER-cleaninng -- can wear down the coating, and wear it right off. What a prior owner might have considered "normal cleaning" may have indeed been "excessive" to you.

That's where "StainGate" comes from.

If you have a MacBook Pro with StainGate, there are really only three ways to handle it:
1. Replace the display panel
2. "Scrub off" ALL of the coating. You will be left with a "glossy" display, but the blotches will be gone.
3. Live with it as it is.