MacBook shuts off

kahlil88 · kahlil88 #1 (**permalink**)

12-13-2010, 08:10 PM

Someone brought in a MacBook to the computer repair shop I work at, originally to diagnose intermittent keyboard issues of some sort (which I have yet to experience, aside from the arrow keys not working). After being on for a few minutes (with or without battery) a shut down prompt will appear and if I don't immediately hit cancel it will just shut off. I tried resetting the PRAM and PMU but it still happens every time. I think it's triggered by the "turn display off" setting.

chscag · chscag #2 (**permalink**)

12-13-2010, 09:53 PM

Try resetting the SMC. Probably not going to work, but worth trying in case the machine has suffered some "brain damage".

kahlil88 · kahlil88 #3 (**permalink**)

12-14-2010, 04:46 PM

That's what I meant by PMU, but I guess they're different?

chscag · chscag #4 (**permalink**)

12-14-2010, 08:56 PM

Since you already tried resetting the SMC, did you try resetting the PRAM/NVRAM? LINK

kahlil88 #1 (permalink)
Member Since: Jan 29, 2008 Location: Mendocino, CA Posts: 680 Mac Specs: 17" MacBook Pro A1151 2.16 GHz	12-13-2010, 08:10 PM Someone brought in a MacBook to the computer repair shop I work at, originally to diagnose intermittent keyboard issues of some sort (which I have yet to experience, aside from the arrow keys not working). After being on for a few minutes (with or without battery) a shut down prompt will appear and if I don't immediately hit cancel it will just shut off. I tried resetting the PRAM and PMU but it still happens every time. I think it's triggered by the "turn display off" setting. There is no system but GNU and Linux is one of its kernels. Join the FSF as an Associate Member!
	QUOTE Thanks

chscag #2 (permalink)
Member Since: Jan 23, 2008 Location: Fort Worth, Texas Posts: 42,156 Mac Specs: 27" iMac i5, 3.2 GHz, iPad 3, iPhone 5c, 3 iPods, Yosemite	12-13-2010, 09:53 PM Try resetting the SMC. Probably not going to work, but worth trying in case the machine has suffered some "brain damage". COMMUNITY RULES Writing a Quality Post
	QUOTE Thanks

chscag #4 (permalink)
Member Since: Jan 23, 2008 Location: Fort Worth, Texas Posts: 42,156 Mac Specs: 27" iMac i5, 3.2 GHz, iPad 3, iPhone 5c, 3 iPods, Yosemite	12-14-2010, 08:56 PM Since you already tried resetting the SMC, did you try resetting the PRAM/NVRAM? LINK COMMUNITY RULES Writing a Quality Post
	QUOTE Thanks

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