I have an unusual problem with a 2015 MacBook Pro 820-00138 and I'm curious to see if anyone else has seen this problem. It has the integrated Intel Iris Pro graphics.
When I turn it on, the screen is black with no backlight. If I connect an external Thunderbolt Display, I will see the extended display on that screen. If I tell the computer to mirror the displays, the Thunderbolt Display will also go black. If I disconnect the internal screen and connect only the Thunderbolt Display, I will have the main screen displayed there. I have tested the screen on another computer and it is known to be good.
Is it possible for a part of the GPU to fail so that the primary display buffer would remain black?
When I turn it on, the screen is black with no backlight. If I connect an external Thunderbolt Display, I will see the extended display on that screen. If I tell the computer to mirror the displays, the Thunderbolt Display will also go black. If I disconnect the internal screen and connect only the Thunderbolt Display, I will have the main screen displayed there. I have tested the screen on another computer and it is known to be good.
Is it possible for a part of the GPU to fail so that the primary display buffer would remain black?
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