A sudden restart of your laptop Acer Aspire 6920?

The laptop is dual-boot Windows 7 and Ubuntu. After updating Ubuntu to 11.10 a sudden started rebooting. (perhaps no more than a coincidence)


The symptoms are the following: the independence of the external reasons for the laptop suddenly turns off (like if you hold down the off button) and after a second or two begins to load. Described occurs both in Windows and in Ubuntu. And if Ubuntu to listen to music or watch a video, then restart is not happening. (to the extent that if you turn the music off, then after a short time restarts, cost while aplay /dev/urandom) In Windows the music does not produce this effect, i.e. when the music restarts, the same happens. However, if you run a heavy game, it reboots almost not happening. (e.g. hours-long gaming session in Skyrim occurred without interruption for reboot, although once when reading the books the reboot occurred, however, after installing updates, restarting has started to happen during the game) in the selection menu grub reboots not happening.

The temperature of the equipment beyond reasonable limits (measured immediately after the reboot), run a memtest'passes without errors.


This is all done with the power cable because the battery is exhausted and does not hold more than an hour of work. Taken out battery, restart same happen. On one battery reboots apparently not happening. With a new battery and another power supply everything was exactly the same.


Don't especially like to carry a laptop into the service center. What you can try to restore the normal operation of the laptop and what might be the problem?
October 8th 19 at 02:35
6 answers
October 8th 19 at 02:37
Solution
This model of laptop goes down condenser Assembly NEC. Needs to be replaced.
Read more in video: https://www.youtube.com/watch?v=zt7rP-roZ5w
https://www.youtube.com/watch?v=CpysrfmDuOs
October 8th 19 at 02:39
Random rebooting can be caused by local overheating (dried up thermal interface and the motion of the crystal body instantly overheats in a small area) — it is in the EEE PC 901 — treated by dissection and replacement thermoprotei garbage (I thermoprotei glue put the copper plate).
While the first time didn't clean the cooling system and not smeared thermal paste — the system could not tell the cause of the fall, and once smeared thermal paste — had to say that critical overheating (although immediately after reboot the temperature was normal).

That as an option.
Yeah... it Happens sometimes... but that's a symptom of: lack of perezagruzka in hours-long session of Skyrim as it suggests that it is not overheating.
Or Skyrim - Garth_Rice commented on October 8th 19 at 02:42
After hours session, the body feels the same twisting/bending forces as in the action when cut down? When I started passing out from local overheating — sometimes even passed out simply from the fact that lifted. - ramon_Block commented on October 8th 19 at 02:45
Then again, it looks strange healing effect of music playing in Ubuntu. Correlations reboots with mechanical loads I found.
Although probably in any case have to be disassembled for a thorough cleaning, at the same time, you can try to find a voltmeter where the voltage is lost in case of a short circuit somewhere. - Ambrose_Pfeffer commented on October 8th 19 at 02:48
I also did not realize that it is not in loops and not in the hall and not even the beetle(!), summer snuck inside, and overheating.
And so — Yes, disassemble, cables to peridot, dirt to clean cooling system clean and update. To eliminate the cause of the problem in turn. - ramon_Block commented on October 8th 19 at 02:51
October 8th 19 at 02:41
And try the energy saver setting to disable the "lull hard disk when idle". It seems when hard goes to sleep You have a computer and restarts. Well, or with another hard drive machine.
Thanks for the idea, I tried to disable it using hdparam -B 255-S 0 /dev/sda but it did not help. And even more so in this case it looks strange that it does not restart when powered by one of batteries and when playing urandom'and. - Garth_Rice commented on October 8th 19 at 02:44
October 8th 19 at 02:43
Boot from any LiveCD poyuzat system, see what happens.
All the same reboots. - Garth_Rice commented on October 8th 19 at 02:46
October 8th 19 at 02:45
Freezing, obviously. Urgently wrapped in a towel!

In General, a couple of times is met on dextop, how to logically explain not know, but always helped change the PSU, maybe the track which is cracked on the motherboard of the laptop...
October 8th 19 at 02:47
Can be bhed on the screw. You have probably disabled BSOD in the BIOS, in any case, in Windows there is a log krasev. There you can see what the error is. Maybe something out of IO
Then it would not reboot with the Live CD, plus not very unclear how it helps the music. - Garth_Rice commented on October 8th 19 at 02:50

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