1 Fan runs briefly, but wont boot up
Macbook belonged to a friend. I was in the process of doing a reset (erase all content and settings from system preferences). Halfway through, it froze shut down.
It's now in a loop where the fan runs for about 1 second every 40 seconds. There is nothing on the screen and no lights or other signs of life.
I opened it up and unhooked he battery connector for 10 minutes. No improvement. I tried all the usual keyboard combinations, PRAM, SMC, safe mode. No change. Fan continues to cycle at regular intervals, without respect to any key/power combinations.
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