NYX 1712 powering on by itself

So earlier this year I experienced a strange problem with my Mythlogic NYX 1712 that I bought in December of 2012. One night I thought I shut it down and then put it in a case like I always do- it's a briefcase style thing that latches tight and doesn't allow airflow. Then the next night I opened it up and found it on so apparently I didn't shut it down. Within a few minutes of starting a game it immediately powered down and the only way I could get it to boot again was to pull the battery for a few seconds. The weird thing is that as soon as the battery was in it started booting up without pressing the power button.

About an hour after that it did the same thing. So then I started looking at the event log to see if I could find anything- there were some strange references to the processor that worried me. After that it did the same random shutdown a few more times, and actually if I just left the machine alone after it powered down it would start itself with the usual "improper shutdown" black Windows screen asking if I want to start Windows normally/safe mode/etc. I've got a bad feeling something overheated while it was in the case, which is weird since it is basically in a nearly powered down state when the lid is shut but I'm not sure. But it's really weird that it would turn on for no reason after a complete shutdown.

That was the gist of the message I sent to Mythlogic in March of this year. So they told me to send it in for them to look at. And I meant to but I stopped using the laptop and was frankly kind of pissed off after having to replace my original graphics card a few months previously and was pretty disheartened and eventually forgot about it. Then this past Thursday I got sick of seeing it sitting there not working and decided to look into it again- especially considering that my 3 year labor warranty is about to expire.

So I put the battery in which I had taken out while I was storing it- After booting it up I let it sit for a while and waited for the problem- nothing, no more random shut-offs. I kept an eye on the event logs and saw some of the same processor warnings in the event viewer that I had the last time but all seemed fine. I thought maybe that sitting for a while had run down the CMOS battery or something (just spitballing, probably had nothing to do with anything) and the problem had magically resolved . I kept using it for the next few days with no issues. Played games, general usage, everything was fine. I completely shut it down and put it away last night around 3am and all was well. Then today I opened it up around 6pm to find it already on. According to event viewer it came on a little after 11am. So I kept using it to see what would happen and nothing happened for a while and then around 10:30pm while surfing the web and while typing mid-sentence it basically went to sleep. I had to press the power button and it brought me immediately to the windows login screen. I logged in and kept waiting to see what would happen. It did this while plugged into the power supply but as far as I can tell it doesn't matter whether it's plugged in or running on battery power.

And then a little after 11pm it turned off again, like if I had lost power or held down the power button to do a hard shutdown. It went to black "incorrectly shut down" screen again at power on, which it would only do after pulling the battery for a few seconds.

So I'm likely going to send it to Mythlogic since that seems like a prudent thing to do before my labor warranty runs out but I was hoping someone might have an idea so I don't have to spend the money to send it off.

I can attach any event logs you may want. If anyone is curious the events I saw in the windows event viewer that seem to be around the same time of the shut down are Kernel-processor-power warnings like "The speed of processor 7 in group 0 is being limited by system firmware. The processor has been in this reduced performance state for 71 seconds since the last report." and that is repeated for the other processor numbers. There are a ton of others but this is long enough already. I don't have any processes or anything set up that should turn it on for any reason.

Any ideas?

Specs:
Processor: Intel Core i7-3740qm 2.7GHz, 6M L3 cache, 22nm, DDR3-1600MHz, quad core
System memory: 16GB (2 x 8 GB) PC3-12800, 1600MHz SODIMM
Graphics card: AMD 8970Ms
2 128GB Samsung 840 Pro series SATAIII SSD's
OS: Windows 7 Professional

I use AVG antivirus regularly and don't surf any questionable sites or do any shady stuff, just normal web stuff and gaming with games all bought from Steam.

(and just now when I was about to submit the thread it went to sleep mid-sentence while typing)

 

When it shut down by himself, you will always got a kernel error. About the cpu error, it can be linked to the kernel error, or to the speed limitation by bios. I had these errors also, system randomly shutdown because my bios was disabled for hibernation (but system was active for hibernation mode only.) Thanks to Prema with his bios, I could enable hibernation in bios and Random shutdown stopped.
If you laptop only purpose you hibernation in option to shutdown, it might be the problem, so just unlock the bios or disable all hiberrnation mode in system ( power option).
Also, maybe it's a physical bug of the button, so you can also try in power option to desactivate any action for 'closing lid' and "button power" to see if it happen again or not. Why i think it can be physical, it's because as you told us, it start alone.
I don't have any other ideas :s but don't do any bios mod since you are in warranty.