Going into deep hibernation, not recovering when the lid is opened.
This issue is making me bats***... my comp has done this 4-5 times now, and will suddenly turn back on even a full week later.
Brand new original mac battery after the last time (which I thought finally solved it) and it was running like a dream... right up until it went into sleep mode while I was letting the battery run low to calibrate, and now it is seemingly totally dead as a door nail again, no lights no sounds black screen.....
If I hadn't witnessed it coming back on randomly even days after trying every possible forced boot combination with zero luck I would think it was the drive or logic board But! they seem just fine when it has come out of this stuck in hibernation quagmire...
Sidebar: When it does finally decide to power on, the last several times it comes back with the screen and programs running right where it left off when it happened.
It's really bizarre. Can anyone please help!
Update (06/27/2018)
Hi Dan! :) Thank you so much for your reply, please excuse my very late one!!
The magnet trick didn't work though did find the magnet, so now trying to figure out where the Hall sensor is.
The machine is a Macbook Pro A1229 17" 2.4 Ghz with 4G RAM. It's been running OSX 10.9.5 Mavericks for quite a while. I've had it since it was brand new and it's been a really good one for graphic design projects until this issue.
So far during the trying to solve what it is doing (intermittently working fantastic w/out a single screen blip or issue, then putting itself to long sleeps that would rival a Disney Princess) To add to the mystery it's now NOT doing the deep hibernation style sleep since I've disabled that through the terminal during one of it's wakey times--now it's going into a regular sleep where it chimes up like normal and I can hear it running. During these times it will not show up on an external screen.
I've tried all the appropriate resets and boot combos and also replaced a lot of things to freshen it up overall (including the upper, lower, and top case with brand new keyboard and cables).
I've carefully replaced the memory sticks, the battery, the battery power cable, the left I/O board, the logic board (some of which I now suspect are perfectly good) and was in mid-installation of a brand new SSD with a clean OS usb boot installation when it did it again *facepalm* and it has been resting peacefully since no matter how much I tickle it's little computer toes. I guess this last thing was a pretty big clue that it's something in the hardware? Have even painstakingly reinstalled the logic board in the case there had been some elusive bubble in the thermal paste, all to no avail.
I don't know if it matters- but all the times it's done this is when it's been sitting stationary and untouched on a desk for a while, it's never done it while it's being moved or the lid being open or closed.
Many times after I've changed something, it will pop back up and run like a dream for days -with me thinking aHA that finally fixed it! Only to have it do it again. When it does wake, as always it's popped right back up where everything left off which was why I thought it was a sleep image issue.
Currently on the way is a gently used Inverter Board Assembly as well as an LCD screen with backlight and inverter cable... I will gladly replace this Hall sensor first if it's easier to get to, if I can figure out where it's at!
Thank you again in advance for your help, though have probably thrown more money at it than it's worth to fix it -at this point would like to squeeze a bit more life out of it if I can!
Cheers ~
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Double check your system info here to make sure we have it right!
Moved it over to its own Q so others see it.
by Dan