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Lanciato il 24 ottobre 2011 / processori quad-core Intel Core i7 da 2,2, 2,4 o 2,5 GHz

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Mac doesn't boot, funs start to speed up. What's the issue?

Hi guys. I explain my problem. I was watching a movie on streaming, while my macbook pro, started to makema strange sound and the video made a double effect. The movie continued to play with this black band in the middle of the screen. After that i turned off the mac and now it doesnt book. After the start sound and the logo, it stucks on the grey screen and the funs start to speed up.

What did i try:

Reset pram and snc

Remove ram

Put the ssd on another mac and the system boots correctly.

If i start the safe mode the mac stucks on a black screen

I connected the mac to an external tv, and there are some multicolor stripes...

Could be damaged the video system?

Is there anything that i can try?

Sorry for my English and thanks in advance for your help.

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Sounds like GPU/VGC (video generator) failure. Check with Apple that this is not a known issue under extended warranty.

DIY solution (a complex project) is to replace the logic board. (GPU/VGC are not user repairable) The board must be of the same model year as yours but an advantage is if you started with a low end machine you could put the fastest board into now. And Max out the RAM while you do this.

If you decide to do this: purchase the recommended tools (every job is easier when you use the proper tools) Study the Guide & notes (not just read them) before you begin, so you don't tear a connector of the logic board or omit unlocking a locking cam on ribbon cables. Keep track of the screws so you know what goes back in which hole.

If this answer is acceptable please remember to return and mark it.

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