Mid 2010 Model A1278 / 2.4 or 2.66 GHz Core 2 Duo processor

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Mac flashes different colors on the screen when turn it on.

When I try to turn on my mac it starts blinking different colors on the screen what can it be

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Bad video card, bad cables.

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I have the same problem, color and grey/shaded bars switch when I start it up, no video on built-in screen whatsoever except for this test-pattern like random switching image. Now, since an external screen on the display port works just fine, I bet (hope) it's a cable issue. Does anyone know where I could start looking to fix it? It's a 2011 MBP so really phasing out it's lifespan right now, but I'd still like to fix it if possible, if only to give the MBP to a kid or something.

Thanks & cheers!



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Luiz will be eternally grateful.
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