Why is my screen dark/black?

Let’s see if we can narrow down what happening here. Can you plug in an external display to see if the image on it is OK. If it is then you've narrowed the issue to the internal display needing to be replaced. If the external display is showing the same effect then the GPU logic on the main logic board is failing and you likely need a new logic board to fix this.

Imagem de MacBook Unibody Model A1278 Logic Board

Guia

MacBook Unibody Model A1278 Logic Board Replacement

Nível de dificuldade:

Difícil

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2 - 4 hours

Imagem de MacBook Unibody Model A1278 Display Assembly

Guia

MacBook Unibody Model A1278 Display Assembly Replacement

Nível de dificuldade:

Moderada

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Thank you for the response, I connected to external monitor and it was fine, the colors where showing fine no distortion, so it would be internal problem? Which requires display assembly replacement?

1 de jan de 2021 por Hyungjun Kim

Yes, time for a new display! Unibody MacBook Complete Display (2008) - Grade-B

1 de jan de 2021 por Dan

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Thank you for the response, I connected to external monitor and it was fine, the colors where showing fine no distortion, so it would be internal problem? Which requires display assembly replacement? — Hyungjun Kim
Yes, time for a new display! Unibody MacBook Complete Display (2008) - Grade-B — Dan