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Spontaneous Shut Downs - No Overheat

Post Date: 2015-06-25
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Blastitt View Drop Down
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Posts: 7 		  Quote Blastitt Quote  Post ReplyReply bullet Topic: Spontaneous Shut Downs - No Overheat
    Posted: 25 Jun 2015 at 7:06am
A few days ago, my laptop started spontaneously turning off. Normally, this would indicate a CPU overheating issue, so I opened up Speccy and it turned out the average temp. of my CPU was reaching around 200F.

I opened up the laptop and cleaned out a thick layer of dust from each fan. This seemed to work for about a day, with Speccy reporting much lower temperatures (130 while idle, 180 gaming).

After about a day of this, the laptop spontaneously died again and has been unable to stay on for more than 3 minutes after boot since. I'm not doing anything processor-intense during this 3 minutes and Speccy reports temperatures no higher than 150F. Windows starts up normally, with no indication of an unexpected shutdown.

Could this be a power supply issue? Did the high temperatures cook the CPU so much it got damaged and must be replaced? Should I try a Fedora livecd to see if it's an OS issue?

Specs:

CPU - Intel i7 4930MX
GPU - NVIDIA GTX 780M
RAM - 32G DDR3
OS - Windows 8.1 Pro 64bit
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bprat22 View Drop Down
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Posts: 20391 		  Quote bprat22 Quote  Post ReplyReply bullet Posted: 25 Jun 2015 at 10:33am
Still sounds like an overheat issue.   Use another temp monitoring program like HWMonitor and check it .  Read it in C and not F.  Just a more standard way.

I would also reset the laptop, clean it of faults, by unplugging the ac and removing the battery to cut all juice to it for a few minutes.  This has fixed alot of strange issues.

Check it for dust again and make sure the fans are running.  

Good Luck. Big%20Smile
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Blastitt View Drop Down
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Posts: 7 		  Quote Blastitt Quote  Post ReplyReply bullet Posted: 25 Jun 2015 at 11:28am
Update:

Removed battery, unplugged, held down power button for about 20 seconds. Opened up and dusted fan ports again.

HWMonitor reported temps around 40C right after boot and eventually got up to 50C. Everything was running normally until Steam crashed (no games running) and the computer shut off shortly thereafter. Total uptime around 10 minutes.
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bprat22 View Drop Down
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Posts: 20391 		  Quote bprat22 Quote  Post ReplyReply bullet Posted: 25 Jun 2015 at 11:31am
Does it shutdown when on battery?   If not, the brick could be going bad. 
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Blastitt View Drop Down
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Posts: 7 		  Quote Blastitt Quote  Post ReplyReply bullet Posted: 25 Jun 2015 at 11:39am
Battery power doesn't last very long, as the box uses up a lot of power very quickly. I always leave it plugged in. HWMonitor had a battery section that said "Charged: 100% / Wear Level: 6%". Does that mean anything important?

Testing battery only now.


Edited by Blastitt - 25 Jun 2015 at 11:42am
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bprat22 View Drop Down
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Posts: 20391 		  Quote bprat22 Quote  Post ReplyReply bullet Posted: 25 Jun 2015 at 11:44am
The battery should last long enough, 1-2 hours,  to know if's the laptop or just a bad brick. 

I'm guessing, but the 6% battery degrade doesn't seem too bad.  The batteries degrading over time is normal. 
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bprat22 View Drop Down
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Posts: 20391 		  Quote bprat22 Quote  Post ReplyReply bullet Posted: 25 Jun 2015 at 3:12pm
Originally posted by Blastitt


Testing battery only now.


How'd it go.    Just curious.
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Blastitt View Drop Down
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Posts: 7 		  Quote Blastitt Quote  Post ReplyReply bullet Posted: 25 Jun 2015 at 3:24pm
Originally posted by bprat22

Originally posted by Blastitt


Testing battery only now.


How'd it go.    Just curious.


I let it get down to `10% charge before plugging it back in. It's now been plugged in and charging while I've used it and everything seems to be fine. Any idea why this would do the trick?

I'm not gonna get my hopes up, though, as it's almost fooled me before and ends up shutting off after a few hours of being perfectly good.
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bprat22 View Drop Down
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Posts: 20391 		  Quote bprat22 Quote  Post ReplyReply bullet Posted: 25 Jun 2015 at 3:29pm
Strange, but a guess would be, while its charging its running off the battery and fully charged it runs off the brick. Not sure how the switching works.

Fingers crossed.
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Posts: 20391 		  Quote bprat22 Quote  Post ReplyReply bullet Posted: 25 Jun 2015 at 3:49pm
Another thought..... if it crashes after battery is fully charged, you might have a bad battery that shorts.    If it crashes at full charge, run just on ac/brick.
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Blastitt View Drop Down
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Posts: 7 		  Quote Blastitt Quote  Post ReplyReply bullet Posted: 27 Jun 2015 at 7:29am
Update:

Just crashed again last night. Windows actually noticed this time.

Source
Windows

Summary
Hardware error

Date
‎4/‎16/‎2015 10:04 PM

Status
Not reported

Description
A problem with your hardware caused Windows to stop working correctly.

Problem signature
Problem Event Name:     LiveKernelEvent
Code:     117
Parameter 1:     ffffe001ee46e4d0
Parameter 2:     fffff801ce682c20
Parameter 3:     0
Parameter 4:     0
OS version:     6_3_9600
Service Pack:     0_0
Product:     256_1
OS Version:     6.3.9600.2.0.0.256.48
Locale ID:     1033

Any insight into what this means?
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Snaike View Drop Down
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Posts: 9462 		  Quote Snaike Quote  Post ReplyReply bullet Posted: 27 Jun 2015 at 7:49am
Originally posted by Blastitt



Date
‎4/‎16/‎2015 10:04 PM



April 16th?
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Blastitt View Drop Down
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Posts: 7 		  Quote Blastitt Quote  Post ReplyReply bullet Posted: 27 Jun 2015 at 8:11am
Originally posted by Snaike

Originally posted by Blastitt



Date
‎4/‎16/‎2015 10:04 PM



April 16th?


You are... right... hmmm... This only popped up when I booted the box back up again today after the crash last night. Didn't even notice the date. Strange...
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bprat22 View Drop Down
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Posts: 20391 		  Quote bprat22 Quote  Post ReplyReply bullet Posted: 27 Jun 2015 at 8:33am
Code 117 could mean your graphics card driver needs a reinstall using Custom, Clean install. Or a different driver.

Graphics card temp is good?

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Blastitt View Drop Down
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Posts: 7 		  Quote Blastitt Quote  Post ReplyReply bullet Posted: 27 Jun 2015 at 7:44pm
I'm still getting crashes while both plugged in and on battery. Looking in Event Viewer it seems that whenever there's a crash, the last thing logged is 8 Event ID 37 events with the following text:

"The speed of processor 1 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."


One for each virtual CPU core.
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