255      iPhone_iPad_Mac_apple

macbook display test patterns and no boot

Hello people.

I have a 2010 white unibody macbook that started with a weird problem I have never seen documented.

After boot chime, it will display a gray screen, then red, then blue, then geen, and then grayscale ramp charts. It will then go black and then the sequence will start again.

It doesnt boot of course.

I tried disconnecting battery, re seating ram, holding power for 10 secs, etc.

Any ideas?

Thanks in advance.

Pepo

最後更新：2017-09-30 09:07:57

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