MacBook Pro only displays externally.
Hi, my MacBook Pro only displays to an external display and will not display to the internal one. I've tried everything, like shining a flashlight through the back, doing a PRAM reset, and doing an SMC reset. I've even swapped out the display. When booted, the internal display is detected, but there is no backlight and no video being displayed internally. Any help would be great.
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