![]() On a side note that might be more relevant than I think, I noticed that this model is one of the models potentially implicated in the MacBook solder scandal (see which lists the 15" Early 2011 model as one of the model lines with problems). Before I make that definitive conclusion, I'm wondering if there are any other ideas that I might try? P.S. ![]() then it must be the motherboard that is bad. Replaced internal memory: symptoms unchangedĪttempted boot with charger unplugged: symptoms unchanged Question: Removed Hard Drive completely (and attempted to boot from USB memory): symptoms unchanged After another reboot returns to original behavior.īoot from USB memory (with MacOS Sierra install): boot menu appears, and allows me to select the USB memory stick for booting, after starting boot process from memory, returns to original behavior (note that I used same memory stick to load MacOS Sierra onto a Mac Mini with no problems) Screen flashes momentarily, then grey screen appears.Ĭlear NVRAM: Apple logo and loading bar appears, freezes, and stays that way forever.Loading bar loads part way, freezes for a while.I have a MacBook Pro 15" (Early 2011) model which suddenly is not booting correctly. ![]()
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