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Lanzado en abril de 2010 / 2.4, procesadores Core i7 de 2.53 GHz o procesadores Core i7 de 2.66 GHz

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SIL flashes 5 times then turns off


Recently I bougth a non working 15” MBP and when I try to power it up the fans and HDD spins up, SIL turns solid white with no image on main and external display. But 5 seconds later the SIL starts flashing 5 times quickly and turns off without any beeps. I tried to understand the issue I couldn’t find anything sadly. Googling the issue lead me to the RAM but I tried 5 different Ram module, tried SMC Reset and any other keyboard resetting techniques. The motherboard looks flawless but I noticed that one of the USB ports were misalligned with the chassis (I think it got damadged by falling) and a resistor on the 5V USB rail was failed and I bypassed it with solder.

Any help would be appreciated. Thanks.

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2 Respuestas

You likely need to replace the damaged component, not bridge it!

I would start there locate the component from a board view drawing and then working off a schematic see what area it was part of.

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@toprakegin post some good pictures of your logic board with your Question. That way we can see what you see. Anytime somebody worked on it (applying jumpers is never really a good fix ;-) you'll need to check that first. Do not forget to check the battery. Depending on what you know about it, I would most certainly replace it was well. Boot in Safe Mode with Shift key down, and check for recent kernel panic data in panic log. Open Panic.log file on hard drive and check for affected interface that crashed. Let us know what you find. You can post a log with your Question as either text or pictures. Agregar imágenes a una pregunta existente

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Toprak Egin estará eternamente agradecido.
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