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Acer 4736G laptop (Windows 7 Home Premium 64 bit) always turned off suddenly

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October 1, 2013 10:05:26 PM

I have a laptop : Acer 4736G, using Windows 7 Home Premium 64 bit.
I use this laptop for web surfing and typing document only, no playing any game.
Recently, I encounter the following issue:
When I typing on the Micosoft word, the computer suddenly turn off instantly by itself, Iwithout any warning.
I power on back the laptop, and it work fine again. But after ~ 1 hour, the same incident happened again.
These type of incident happened on these ways:
1. It turn off suddenly when I am surfing the net, typing a document, or do nothing at all.
2. Sometime, when I press the ‘power on’ button, it can turn off suddenly before it reached the ‘windows log in page’. (Sometime this thing can happened few times continuously before I can successfully log into the windows)

I read few recommendation from the internet and I have done the following but so far it still not able to solve my problem:
1. I reformatted my computer, but only C drive, and reinstall the Windows.
2. I swapped my 4G ram with my friend’s ram.
3. I opened out the laptop, and cleaned the cooling fan, heatsink.
4. I installed the software which can measure my CPU, GPU, processor temperature, but the temperature is normal (around 45-60 celcius) . I suspect it is not due to heating problem, because got few time, my laptop suddenly turn off was my first time turn it on in the morning when I waked up from the bad. That time, my laptop turn off suddenly before it reached the ‘Windows log in page. That period of time ~1-2 minute, so I ruled out the heating problem.
5. My laptop can suddenly turn off even it was inside ‘safe mode’.
6. However, if I turn on the laptop and enter the bios page, and leave it there, so far it never turn off by itself. I tried to leave it in the bios page for 1 hour, and it is ok.

Does everybody encounter this type of symptom before? I appreciate your valuable input. Thanks in advance.
a b D Laptop
October 1, 2013 10:18:20 PM

Does this happen regardless of whether or not it using the battery only or if it is plugged in to an outlet? You say you switched RAM with a friend. Was the RAM from the same model of laptop (are the RAM specs the same)? Did your friend use the RAM you swapped out? If yes, did he/she encounter any problems?
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October 1, 2013 10:42:10 PM

kenrivers said:
Does this happen regardless of whether or not it using the battery only or if it is plugged in to an outlet? You say you switched RAM with a friend. Was the RAM from the same model of laptop (are the RAM specs the same)? Did your friend use the RAM you swapped out? If yes, did he/she encounter any problems?


Yes, This happen regardless of using battery or direct outlet supply. My friend's laptop is from the different model , but also Acer laptop. So far my friend not using my ram yet, i just tried out his ram only. But i encounter same problem using his ram too. Any idea?
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October 1, 2013 10:42:59 PM

kenrivers said:
Does this happen regardless of whether or not it using the battery only or if it is plugged in to an outlet? You say you switched RAM with a friend. Was the RAM from the same model of laptop (are the RAM specs the same)? Did your friend use the RAM you swapped out? If yes, did he/she encounter any problems?


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a b D Laptop
October 1, 2013 11:12:02 PM

Does it sound like a fan is running at high speed (or at all) just before it shuts down? It sounds like the laptop is running too hot, and shutting off to protect itself.

Casey

*EDIT* Forget what I just typed. I completely missed the line about the temperatures. Too late at night for me...
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October 1, 2013 11:19:28 PM

cklaubur said:
Does it sound like a fan is running at high speed (or at all) just before it shuts down? It sounds like the laptop is running too hot, and shutting off to protect itself.

Casey

*EDIT* Forget what I just typed. I completely missed the line about the temperatures. Too late at night for me...


Hi Casey,
The fan looks not running at high speed. I suspect it is not due to heating problem, because got few time, my laptop suddenly turn off during my first time turn it on in the morning when I waked up from the bed. That time, my laptop turn off suddenly before it reached the ‘Windows log in page. That period of time ~1-2 minute, so I ruled out the heating problem.
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Best solution

a b D Laptop
October 2, 2013 9:21:17 PM

I read somewhere that it could be a motherboard issue. Hopefully, that won't be true for you. I take it you get no error messages on these random shutdowns.
Try this if you haven't already:
1) Click on Start
2) Right click on Computer
3) Click on Properties
4) Click on System Properties
5) Click on the Advanced tab
6) Click on Settings under Startup and Recovery
7) Under System Failure make sure that there is check beside Write an event to the system log.
8) Make sure Kernel memory dump is the default setting under Write debugging information
9) You may want to uncheck Overwrite any existing file to see how many dump files it creates. This will help in determining if there are multiple issues.
10) Click on OK to exit.

Once you have the dump file(s) you can post with a link to those files or use something like BlueScreenView (http://www.nirsoft.net/utils/blue_screen_view.html) to read the dump files.
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October 3, 2013 11:00:26 PM

kenrivers said:
I read somewhere that it could be a motherboard issue. Hopefully, that won't be true for you. I take it you get no error messages on these random shutdowns.
Try this if you haven't already:
1) Click on Start
2) Right click on Computer
3) Click on Properties
4) Click on System Properties
5) Click on the Advanced tab
6) Click on Settings under Startup and Recovery
7) Under System Failure make sure that there is check beside Write an event to the system log.
8) Make sure Kernel memory dump is the default setting under Write debugging information
9) You may want to uncheck Overwrite any existing file to see how many dump files it creates. This will help in determining if there are multiple issues.
10) Click on OK to exit.

Once you have the dump file(s) you can post with a link to those files or use something like BlueScreenView (http://www.nirsoft.net/utils/blue_screen_view.html) to read the dump files.


Thanks Kenrivers.
Yesterday night i tried install a brand new hardisk into the Acer laptop.
However, during installation of windows, the laptop also turned off suddenly during the process.
That cause me think that, this is not the harddisk problem.


I checked my setting , and found that those setting is same with what you suggested. Except 'Step 9'. So far, i already 'checked' for step 9.

I still struggling on how to use the 'BlueScreenView' to read the dump file....

Just now i read a post , talking about the same model of laptop, having the symptom more or less like me.
What the author suggested is that problem maybe due to one of the capacitor inside failure (that capacitor used for power supplying circuit).
The capacitor is: NEC/TOKIN OE907 (proadlizer capacitor). To replace it, will involving solder and desoldering process..
I afraid i may damage the mother board....: (
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