newpersn Posted June 16, 2017 Posted June 16, 2017 We got a MacBook Pro which randomly turns off. We've checked HD/Charger and still no luck. Any ideas before we skip it?
difinity Posted June 16, 2017 Posted June 16, 2017 You could try resetting the SMC, have you checked for dust bunnies in the fan ? how long is the random, a few seconds or minutes ? 1
newpersn Posted June 16, 2017 Author Posted June 16, 2017 can be after the turn on sound or half way though booting. Checked for dust bunnies ands clean.
tg12 Posted June 16, 2017 Posted June 16, 2017 I'd second resetting the SMC and checking the fan for dust probably isn't a bad idea either. 1
newpersn Posted June 16, 2017 Author Posted June 16, 2017 Dodgy hard drive if it's not even booting ? We swapped the hd for a new SSD and still the same. Will try SMC on Monday.
vikpaw Posted June 17, 2017 Posted June 17, 2017 Known to overheat which over time will cause issues. Is it hot above the keyboard by the hinge? We had 3 like that which we ended up replacing. 1
newpersn Posted June 17, 2017 Author Posted June 17, 2017 Known to overheat which over time will cause issues. Is it hot above the keyboard by the hinge? We had 3 like that which we ended up replacing. Can't see it overheating within 30 seconds of turning it on. Will strip it and reset cpu on Monday
Marci Posted June 19, 2017 Posted June 19, 2017 A lot of the Mid2012's were subject to a factory recall on the GPU, which would begin to desolder itself if it got too hot... once this process began, behaviour as you're describing was regularly experienced. Mine ended up horrendously flakey before I finally got round to taking it in for sorting out. When it behaved, all was well, but sporadically it'd switch off and reboot. Sure-fire tester is Unigine Heaven benchmark. If when you run this the MBPro immediately conks, then it's highly likely that it's GPU death. The factory recall to get the logic board swapped out for a replacement ended in February last year I think... 1
colly72 Posted June 19, 2017 Posted June 19, 2017 Reset SMC or PVRAM. Battery could also be on its way out. I've had all 3 happen on my own mid-2012 Macbook Pro. Replaced battery with decent 3rd party one and this fixed my issue, after doing multiple full charge/discharge cycles. 1
vikpaw Posted June 19, 2017 Posted June 19, 2017 That was it. It was the GPU that caused overheating on ours. The fans would just go crazy. After manifesting for a while it would just randomly get hot and turn off. 1
newpersn Posted June 19, 2017 Author Posted June 19, 2017 Had it part today and done all the above and still no luck. May have to scrap it. Unless I can pickup a new logic board (main board)
vikpaw Posted June 20, 2017 Posted June 20, 2017 I took mine apart, kept the HDD and the ON button. Not sure why, just thought I might use it for something, still haven't! [The button I mean ] 1
newpersn Posted June 20, 2017 Author Posted June 20, 2017 I took mine apart, kept the HDD and the ON button. Not sure why, just thought I might use it for something, still haven't! [The button I mean ] I posted on Apple forums about it - Someone said run AHT (come back fine) but did notice that it didn't pickup a voltage on one of the hardware profiles..
Dos_Box Posted June 20, 2017 Posted June 20, 2017 @ZeroHour had one of these with the GPU solder issue. There is plenty of info out there on it, but Apple dragged there heels in acknowledging there was any problem and many lost out on the replacement mainboard.
vikpaw Posted June 20, 2017 Posted June 20, 2017 Thankfully we had planned to upgrade anyway, as the RAM was too low, even after we did our own upgrade after purchase. I think we managed a few years on them, which isn't long by Apple standards. I've had a mid 2015 MBP since and it's going strong still. Had to go cheap on disk space as it was a personal purchase while between jobs, but otherwise it's ok. Prob gonna get a Transcend SD JetDrives or go even cheaper and get a micro-SD and an adapter widget.
difinity Posted June 20, 2017 Posted June 20, 2017 It was the Nvidia bump scandal that Apple and several others got caught out with. The solder bumps fail internally of the chip due to poor quality underfill. Reflowing or reballing the chip can and often does repair the situation but usually only temporarily as the chip is defective and all that is really happening is the contacts are being resoldered inside the chip. Replacing with a new 2015 chip that doesn't have this issue is the solution however there are a massive amount of fake chips on the market and as Nvidia don't sell direct it's a bit of a crap shoot. There is a bit about it from Apple here. https://www.apple.com/uk/support/macbookpro-videoissues/ Some technical stuff explaining the issue in detail with photos here. Investigation confirms Apple Macbook Pros have Nvidia bad bump material - SemiAccurate
newpersn Posted June 20, 2017 Author Posted June 20, 2017 It was the Nvidia bump scandal that Apple and several others got caught out with. The solder bumps fail internally of the chip due to poor quality underfill. Reflowing or reballing the chip can and often does repair the situation but usually only temporarily as the chip is defective and all that is really happening is the contacts are being resoldered inside the chip. Replacing with a new 2015 chip that doesn't have this issue is the solution however there are a massive amount of fake chips on the market and as Nvidia don't sell direct it's a bit of a crap shoot. There is a bit about it from Apple here. https://www.apple.com/uk/support/macbookpro-videoissues/ Some technical stuff explaining the issue in detail with photos here. Investigation confirms Apple Macbook Pros have Nvidia bad bump material - SemiAccurate Thats only got the 15" listed as the affected model. And i'm sure it has the Intel Graphics not nvidia. Ive ordered a new battery for it as it was on charge over night (led on magsafe was on green when unplugged) and not starting on battery.. Will update on that when battery turns up.. (If it is the battery when i will be shocked.....)
james10-100 Posted June 21, 2017 Posted June 21, 2017 If you boot the mac into recovery, does it remain powered up?
Marci Posted July 10, 2017 Posted July 10, 2017 I've had a mid 2015 MBP since and it's going strong still. Had to go cheap on disk space as it was a personal purchase while between jobs, but otherwise it's ok. Keep an eye out for coating coming off on the screen on that one... October this year is the close-down for being able to get the panel replaced under recall (was February but apparently they extended it again) 1
vikpaw Posted July 11, 2017 Posted July 11, 2017 Keep an eye out for coating coming off on the screen on that one... October this year is the close-down for being able to get the panel replaced under recall (was February but apparently they extended it again) Not noticed anything so far. It gets subjected to a lot of heat as well.
Marci Posted July 11, 2017 Posted July 11, 2017 Not heat related, this one... just general handling. Mine’s lost it’s AR coating all round the edges and where keys touch the screen at corners when closed - see https://i1.wp.com/www.atpeaz.com/wp-content/uploads/2015/10/IMG_7047.jpg?fit=2048%2C1536&ssl=1 1
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