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Windows 7: PC shutdown itself, help

26 Nov 2014   #11
Layback Bear

Windows 7 Pro. 64/SP-1
 
 

I recommend starting at square (1)

Install a known quality power supply.

Other test on the system mean very little unless the system is properly powered.

We still don't have the OP System Specs filled in.


My System SpecsSystem Spec
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26 Nov 2014   #12
Itaregid

Windows 10 Professional 64-bit
 
 

Quote:
The only information that is important to the OP - regarding the possibility that the power supply is cutting out - is whether he/she has an easy way to see if all power to the motherboard is going off.
I disagree. If even one of the three required voltages is missing, or out of tolerance, or "dirty" (too much ripple), the computer will not work.

So again, as noted and now reiterated by Layback Bear, "Install a known quality power supply" and see what happens.
My System SpecsSystem Spec
01 Dec 2014   #13
Nenad2

Macedonia
 
 

Quote   Quote: Originally Posted by Itaregid View Post
Quote   Quote: Originally Posted by TVeblen
If your motherboard had a low power indicator LED we would know if ALL power was going out when this happens.
Sorry, but no, that is not true either. The PSU outputs 3 separate voltages used by the various computer components; +3.3VDC, +5VDC, and +12VDC (plus +5Vsb standby voltage for when the computer is in sleep and standby modes). One "low power" LED indicator (and I have never seen a "low" power LED so sure would like to see a link to such a motherboard) could not report statuses of all 3 voltages.

As I noted above, typically, IF the motherboard has "a" LED, as in 1 LED, it is there to remind users there is still power present on the motherboard, such as when the PSU is outputting the ATX Form Factor standard required +5Vsb standby voltage needed for the various "Wake on..." commands - such as "Wake on Mouse" and "Wake on Keyboard", as well as the case's front panel power button.

But again, most motherboard's don't have power indicators because the case's front panel power LED indicator tells you when your computer is on (LED solid), S1 Sleep state (LED flashing), or S3/S4 sleep or powered off (LED off).

It is important as helpers we research the OP's computer specs and not assume what we see on our computers is the same with everyone's, so we don't confuse and lead readers astray with time wasting misinformation. A quick look at the GA-M52L-S3 User's Manual confirms this Gigabyte board does NOT have any motherboard LEDs, except for the Activity and Speed LEDs for the integrated NIC.

Personally, I don't see this being a faulty CPU since it does work sometime, unless the CPU is overheating. Are the case interior, CPU heatsink and vents all clean of heat-trapping dust?

Quote   Quote: Originally Posted by Nenad2
Well i tested memory 2-3 this 2 month didnt find any errors model of PSU is ATX-400W P4
Did you let the RAM tester run for several passes? That is important but note no software based memory tester is conclusive. If they report errors, the RAM is bad. But they often report no problems but the RAM still fails when installed, or when paired with other RAM. So testing and/or running with one stick at a time is often necessary (or simply swapping in new RAM).

As for your PSU, "ATX-400W P4" is a "generic" designation. So as I mentioned above, swapping in a known good supply to ensure good, clean power is the first thing I would do. Without knowing for certain the PSU is good, you cannot be certain problems seen with other components are not due to bad power from the PSU.
Yes all vents are clean from dust, etc. psu vent graphic card vent and cpu vent all are clean from dust sry for late reply.
And yes ram memory run for several passes and didnt find any errors, and i dont have viruses or malware that can cause pc to shutdown. I think that PSU is problem but im sure that this PSU is compatible with this pc hardware and will try to run pc with another power supply ty for help
My System SpecsSystem Spec
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01 Dec 2014   #14
Itaregid

Windows 10 Professional 64-bit
 
 

Quote:
I think that PSU is problem but im sure that this PSU is compatible
I am sure "compatibility" is not a problem either. That's what the ATX Form Factor standard ensures. I am just not sure the PSU is working properly.
My System SpecsSystem Spec
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 PC shutdown itself, help




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