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Windows 7: Computer is shutting down randomly

13 Apr 2017   #21
amoretam

Windows 7 x64bit Home Premium
 
 

Hi there,
I just tested the Grey wire and the result was: - 3.71.

I did it by placing the positive lead plug in the Grey pin and the Black lead plug to the Green pin (as seen on a video)

Edit: Ok here are the results for the others:

Yellow = 11.78
Red = 5.11
Blue = -11.35
Orange = 3.31
Grey = 5.11
This time I did it by placing the positive lead plug in the Grey pin and the Black lead plug to the a Black pin (accidentally)

What do you think?

Thanks


My System SpecsSystem Spec
.
13 Apr 2017   #22
ICIT2LOL

Desk1 7 Home Prem / Desk2 10 Pro / Main lap Asus ROG 10 Pro 2 laptop Toshiba 7 Pro Asus P2520 7 & 10
 
 

Ok I don't know what video that was but the black is always to black as you found.

That green lead is a pic that can be sorted to a black pin because that is the power on switch connections?

Now wanting you to play around with any pSU's unless you are fairly savvy with them because there are parts - usually the large capacitors in them that hold a high voltage charge very similar to a heart defibrillator and yes it will have the same effect on you as one.

In nutshell defibs are used to actually stop all electrical activity in the heart in the hope that it will start beating in a normal rhythm because a lot of heart attacks are caused when the heart starts to beat in a rhythm that is not conducive to life. . I know this because I am an RN of 44+ years so please DO not mess with these devices unless you know what you are doing.

I do have an old PSU set up to test fans etc using a bridge connection between the black and green pins but again unless you research it really well DO NOT try to use one for anything without the knowledge needed.

NOw backing up - the blue lead is actually the -12v (negative) pin and it's importance is not really that relevant these days - I stand to be corrected of course.

The colours that are important are yellow +12v (positive) red +5v and orange +3.3v

Now those readings have to be with +/- 5% of the required voltage any more or less can cause damage to components though most modern PSU's have circuitry (POWER_GOOD +5v grey cable pin) that will not allow a machine to boot or even start for that matter if the +5 does not appear at the grey pin when powering up the machine.
See this table
Limits +/- (minimum - correct - maximum)
12v1 = 11.4 - 12 - 12.6v
12v2 = 11.4 - 12- 12.6v
5v = 4.75 5 - 5.25v
3.3v = 3.135 3 3.465v
-12v = -10.80 - -12 - -13.20v
+5VSB = 4.75 5 - 5.25v
The Power good signal voltage at pin 8 on the 24 pin plug (grey cable) should be the same as the 5v rail reading/s

But well done for getting that done as it is in my mind better than getting reading from softwares that can be often off mark personally I don't really rely too much on the BIOS but others may disagree.
My System SpecsSystem Spec
13 Apr 2017   #23
amoretam

Windows 7 x64bit Home Premium
 
 

Quote   Quote: Originally Posted by ICIT2LOL View Post
Ok I don't know what video that was but the black is always to black as you found.

That green lead is a pic that can be sorted to a black pin because that is the power on switch connections?

Now wanting you to play around with any pSU's unless you are fairly savvy with them because there are parts - usually the large capacitors in them that hold a high voltage charge very similar to a heart defibrillator and yes it will have the same effect on you as one.

In nutshell defibs are used to actually stop all electrical activity in the heart in the hope that it will start beating in a normal rhythm because a lot of heart attacks are caused when the heart starts to beat in a rhythm that is not conducive to life. . I know this because I am an RN of 44+ years so please DO not mess with these devices unless you know what you are doing.

I do have an old PSU set up to test fans etc using a bridge connection between the black and green pins but again unless you research it really well DO NOT try to use one for anything without the knowledge needed.

NOw backing up - the blue lead is actually the -12v (negative) pin and it's importance is not really that relevant these days - I stand to be corrected of course.

The colours that are important are yellow +12v (positive) red +5v and orange +3.3v

Now those readings have to be with +/- 5% of the required voltage any more or less can cause damage to components though most modern PSU's have circuitry (POWER_GOOD +5v grey cable pin) that will not allow a machine to boot or even start for that matter if the +5 does not appear at the grey pin when powering up the machine.
See this table
Limits +/- (minimum - correct - maximum)
12v1 = 11.4 - 12 - 12.6v
12v2 = 11.4 - 12- 12.6v
5v = 4.75 5 - 5.25v
3.3v = 3.135 3 3.465v
-12v = -10.80 - -12 - -13.20v
+5VSB = 4.75 5 - 5.25v
The Power good signal voltage at pin 8 on the 24 pin plug (grey cable) should be the same as the 5v rail reading/s

But well done for getting that done as it is in my mind better than getting reading from softwares that can be often off mark personally I don't really rely too much on the BIOS but others may disagree.
Ok thanks a lot.
I did not understand very well.

Is my PSU good or damaged?
what should I do now?
My System SpecsSystem Spec
.

14 Apr 2017   #24
ICIT2LOL

Desk1 7 Home Prem / Desk2 10 Pro / Main lap Asus ROG 10 Pro 2 laptop Toshiba 7 Pro Asus P2520 7 & 10
 
 

No mate the PSU looks ok the +12v is creeping down at 11.78v but nothing to be concerned about

This Posted are the volts you need to be aware of normal upper and lower limits
Limits +/- (minimum - correct - maximum)
12v1 = 11.4 - 12 - 12.6v
12v2 = 11.4 - 12- 12.6v
5v = 4.75 5 - 5.25v
3.3v = 3.135 3 3.465v
-12v = -10.80 - -12 - -13.20v
+5VSB = 4.75 5 - 5.25v

I am only letting you know because as you know computer components ie the CPU these days are markedly affected by even the slightest/tiny difference in the operating voltage one way or the other for example in increasing their frequency and hence the heat produced by the extra load.
My System SpecsSystem Spec
14 Apr 2017   #25
hazel123

W7 HP 64 bit
 
 

Is it actually just shutting down randomly or actually crashing to black screen and shutting down? I ask because I had this recently and it was when the graphics was overloaded (rubbish graphics driver and too much stuff on my system). It's stopped doing it since I did a clean install. But had to install the graphics driver to do the clean install. Might be my graphics card as well. Just a thought, but I'm not one of the experts :-)
My System SpecsSystem Spec
14 Apr 2017   #26
amoretam

Windows 7 x64bit Home Premium
 
 

Quote   Quote: Originally Posted by hazel123 View Post
Is it actually just shutting down randomly or actually crashing to black screen and shutting down? I ask because I had this recently and it was when the graphics was overloaded (rubbish graphics driver and too much stuff on my system). It's stopped doing it since I did a clean install. But had to install the graphics driver to do the clean install. Might be my graphics card as well. Just a thought, but I'm not one of the experts :-)
Computer is shuting down randomly, and then it reboots. Sometimes it will stay off, sometimes it will loop.
When it crashes and stays offf, when I go to turn it on, sometimes it will loop no even getting to the BIOS.
I do not have dedicated graphics card

I am ready to keep on troubleshooting peoeple, any help appreciated

Thanks a lot
My System SpecsSystem Spec
14 Apr 2017   #27
hazel123

W7 HP 64 bit
 
 

Only time I've had something like that, it was a virus but could but a lot of other things as well - and the more expert people will know. I don't quite understand your set up. This might be a silly question but have you run malwarebytes antimalware?
My System SpecsSystem Spec
14 Apr 2017   #28
johnhoh

Win7 pro x64
 
 

Quote   Quote: Originally Posted by amoretam View Post
I am ready to keep on troubleshooting people, any help appreciated
Thanks a lot
Can you post a screenshot as discussed in post #15
My System SpecsSystem Spec
14 Apr 2017   #29
hazel123

W7 HP 64 bit
 
 

Just remembered - another time I had that was after upgrading bios on a machine.
My System SpecsSystem Spec
14 Apr 2017   #30
amoretam

Windows 7 x64bit Home Premium
 
 

Quote   Quote: Originally Posted by johnhoh View Post
Can you post a screenshot as discussed in post #15

cannot boot computer to Windows,
and if I boot to windows, it will shutt off before I am done with that.

thanks
My System SpecsSystem Spec
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 Computer is shutting down randomly




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