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Windows 7: computer turning off randomly

21 May 2015   #11
amoretam

Windows 7 x64bit Home Premium
 
 

Quote   Quote: Originally Posted by mvthakar View Post
I had a similar situation about 3 months ago with my desktop
which has a AMD FX-4100, 4 GB RAM and Windows 8.1 Pro.

It turned out that it wasn't getting enough power supply.

My PC would stay powered on for about a few minutes then suddenly it would restart / shutdown.
Check if the same is with you
How do I check that.....I have like 3 years being powered by the same Psu ..

Thanks


My System SpecsSystem Spec
.
22 May 2015   #12
TVeblen

Microsoft Community Contributor Award Recipient

Windows 7 64 Bit Home Premium SP1
 
 

Listen to mvthakar.

Very often these types of problems are due to a poor, underpowered, or failing power supply.
You can test this by borrowing another (larger) supply and trying it for a while. Or, you can disconnect all but the essential components to reduce the load.

Another common cause is poor grounding or short circuit. If you have a motherboard standoff in the wrong place, loose connectors, and sometimes either hair or dust in slots can do it.
You can break the build down, check everything, and put it all back together to see if that helps.
My System SpecsSystem Spec
30 May 2015   #13
amoretam

Windows 7 x64bit Home Premium
 
 

Hello,..

Yesterday I uninstalled the motherboard and its components and installed it into a new case,I cleaned parts and tested with minimun hardware and different locations for RAM sticks..
Nothing, same problem.
I turn the computer on but it turns off in about 20 seconds, sometimes it restarts itself, most of the time it will not.

Today I tested with a new power supply and same thing, ...

Please tell me that my motherboard is not damaged..!


Help

Thanks
My System SpecsSystem Spec
.

31 May 2015   #14
GokAy

Windows 7 Ultimate x64 SP1
 
 

No idea about motherboard, all I can say at the moment is did you try the computer at a different location/ a different power plug?

When you say minimal hardware, did you remove the GPU and see if it will stay on too?

Do you have a PC speaker connected to motherboard? If not just buy one, it may help in diagnosing. Should be 1-2 USD and you can remove it later.
My System SpecsSystem Spec
31 May 2015   #15
TVeblen

Microsoft Community Contributor Award Recipient

Windows 7 64 Bit Home Premium SP1
 
 

Nice work so far. You have eliminated a few possibilities as causes.

Another test to try is to run the system with a bare minimum # of parts: Power Supply, Motherboard, CPU & Cooler. Disconnect and remove everything else.
Turn the motherboard on (you can just connect the two pins on the PWR header with a flat screwdriver to do so) and then wait and see if it shuts down on it's own.
(If you have a speaker connected to the motherboard as GoKay mentioned you would hear beeping - an error code that tells you there is no RAM detected. We know!)
(You will not be able to see anything on the monitor, and the PC will not boot, of course. That is not a problem for this test)

If the system stays on and runs for a minute or two (any time longer than the problem period) then shut down using the power supply switch then add 1 stick of RAM in the first RAM slot (usually A1) and test again. (You would get another beep error code now: No Video Card detected.)

Then shut down, install the video card, connect it to your monitor, and test again.

See if you can pinpoint which part, when connected, causes the symptom. You can continue the test, adding parts back to the system one at a time and testing between each, until you have reassembled the whole thing.

If the system shuts down by itself with just the Power Supply, Motherboard, CPU & Cooler attached, then you know it is a problem with one of those parts.
And you have eliminated the Power Supply already.....
My System SpecsSystem Spec
31 May 2015   #16
amoretam

Windows 7 x64bit Home Premium
 
 

Thank you people I will do of this soon.
If you look at me system specs, you will notice that I don't use a graphic card, I use sandy bridge.

I have a speaker that came with the case, I will install it and proceed.
Thanks for fast response.
My System SpecsSystem Spec
02 Jun 2015   #17
amoretam

Windows 7 x64bit Home Premium
 
 

Ok people as TVeblen suggested, I disconnected all parts except cpu and motherboard and psu of course. The problem persists.
I cannot believe this! I also used another outlet when tested with another Psu.
I cant believe my mobo is damaged, I bought it in July 2012 and it was kept in pretty good conditions.
And I cannot seem to find it in internet anymore....

What do you think?

Thanks
My System SpecsSystem Spec
02 Jun 2015   #18
TVeblen

Microsoft Community Contributor Award Recipient

Windows 7 64 Bit Home Premium SP1
 
 

How about CPU cooling? The system is designed to shut down if the CPU exceeds max temperature.
Have you checked the temps reported in BIOS?
My System SpecsSystem Spec
02 Jun 2015   #19
amoretam

Windows 7 x64bit Home Premium
 
 

Quote   Quote: Originally Posted by TVeblen View Post
How about CPU cooling? The system is designed to shut down if the CPU exceeds max temperature.
Have you checked the temps reported in BIOS?
I dont have acess to the BIOS..
Plus the cpu is cold on first boot
My System SpecsSystem Spec
03 Jun 2015   #20
amoretam

Windows 7 x64bit Home Premium
 
 

Hello
My System SpecsSystem Spec
Reply

 computer turning off randomly




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