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Windows 7: Computer is shutting down randomly

03 May 2017   #61
ICIT2LOL

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

Quote   Quote: Originally Posted by johnhoh View Post
if none of the above produces any improvement, its time to try a different power supply
Yes mate but didn't we go through that already?? and it tuned up all good?? without hunting right back I can't remember.

Another way of testing the temp on the CPU (or anything really) is to get one of those infrared/laser temp guns they are cheap enough and I use them all the time for lots of things. (I keep two handy to check each temp reading and also for keeping in another part of my house.
IR Laser Point Digital Infrared Thermometer Temp Temperature Gun Battery Powered | eBay

Getting the data of well I think I mentioned earlier how I do that but if you prefer the other method it is almost the same just quicker.




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Computer is shutting down randomly-temp.png  
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11 Aug 2017   #62
amoretam

Windows 7 x64bit Home Premium
 
 

I know it has been a long time but here I am.
I took every component apart and I am williing to start over.
Can i test the mobo with just the psu connected?
No cpu, no fan, no anything.?
This way i can see if it stays on.

Thanks
My System SpecsSystem Spec
11 Aug 2017   #63
ICIT2LOL

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

In a nutshell mate no because just what re you going to test? If I am not terribly wrong you can hook up the board and see if the power LEDs are on and it is going to tell just about that power is connected to the board.


You could put the board on the bench and test with a minimal number of components ie CPU RAM and monitor and takes readings of voltages etc that way but again this is very simplistic.

Have you thoroughly checked the bare board for any signs of faulty components ie caps burnt out resistors tiny chips or even scorch marks on the printer circuit board itself (PCB) any loose connection s such as RAM slots does the CMOS battery need a renewal etc etc.
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12 Aug 2017   #64
TechnoMage2016

Windows 7 Ultimate, SP1, x86
 
 

Quote   Quote: Originally Posted by johnhoh View Post
if none of the above produces any improvement, its time to try a different power supply
That's never a bad thing. I usually have a Known-Good PSU laying around that I can use for testing.
Just the idea that any computer shuts down randomly is in error. Although it may seem random to the user, it's never random to the computer itself. Some error caused the shutdown, and it's just up to the user (or a repair tech) to figure out what that reason was.

The PSU is always my first thought, but that can change quickly when I open the case and see several of the motherboard capacitors Bulging and/or leaking. Even though I AM a board level repair tech, a mobo with bad caps is Dumpster Food. Oh yes, I have re-capped mobos before, but it's a long and tedious process and requires some special tools to do it right and not trash the board.

Good Luck
My System SpecsSystem Spec
12 Aug 2017   #65
Jimph

Windows 7 home premium 64bit
 
 

I think you should test your computer on/off switch ( PC momentary switch) if you haven't already done so. I think that could be your problem as it was mine.

Follow the cable from the switch to the small plug on the m/board and remove it from the 2 small pins which it plugs into.

Switch on the power then momentarily connect the two pins together. I find a small phillips type screwdriver ideal for this.
Your pc will now boot. If it stays on then renew the momentary switch and problem solved. If not, then it's back to square one.

PC momentary switches are avaliable complete with cable and plug from Amazon and other outlets for a couple of pounds (or dollars).

Good luck.
My System SpecsSystem Spec
12 Aug 2017   #66
ICIT2LOL

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

Quote   Quote: Originally Posted by TechnoMage2016 View Post
That's never a bad thing. I usually have a Known-Good PSU laying around that I can use for testing.
Just the idea that any computer shuts down randomly is in error. Although it may seem random to the user, it's never random to the computer itself. Some error caused the shutdown, and it's just up to the user (or a repair tech) to figure out what that reason was.

The PSU is always my first thought, but that can change quickly when I open the case and see several of the motherboard capacitors Bulging and/or leaking. Even though I AM a board level repair tech, a mobo with bad caps is Dumpster Food. Oh yes, I have re-capped mobos before, but it's a long and tedious process and requires some special tools to do it right and not trash the board.

Good Luck
Well I am no techie but Technomage has really said what I believe in and do. If there are any bulging caps then ok if they are fairly large (unlikely these days) then replace it but you can bet your sweet life there will be another one (or two) right behind it ready to go south.
My System SpecsSystem Spec
01 Sep 2017   #67
amoretam

Windows 7 x64bit Home Premium
 
 

Ok people.
I completely disassembled the computer and started over.
Only mobo, PSU and cpu and HSF. Still the same f***ing rebooting.
I then installed one stick of RAM and the same sh*t, a little different behavior, but still the booting loop.
I then took another PSU, a little different behavior, (probably takes a little longer to reboot, but still in loop.

The time it takes to reboot always seems to vary, which I find odd. Sometimes it takes less than a second to reboot the first time, sometimes it takes 3 or 4 seconds, and then it behaces randomly but always in loop.

I am tired....I have like one year with no computer dealing with this stuff.

I believe the faulty component is the MOBO correct?

If it's the mobo, How do you guys think I can get another mobo in order to preserve my current components??

thanks a lot...
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01 Sep 2017   #68
ICIT2LOL

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

Ok well I suppose the finger is being pointed at the mobo if the PSU is still ok from memory the 12v rail was not real flash at I think it was 11.7v. Also if you use your spare pair of hands (just joking) test the temps (BIOS) should let you can if it starts at all which makes me think what are you BIOS setting's I would be inclined to se then at default or optimised.

Personally I would jury rig a multimeter to the grey and black connections and then see what the readout is when you power up. Also check for the RAM beep if you get more than one then I would be seriously thinking a RAM issue.

Now if it is the mobo then using the same components presuming you can find a board for and I would not be holding my breath on that one because I for example have an Ivy B with multiple problems like you that truly are beyond reason - fix one thing and another shows up and like you the chances of finding a new board for it are pretty darn zero (out here at least).

Those Sandy Bridge components then if you are stuck with the same issue then one of those components is likely to be the culprit. It might be an idea to take them to a techie who has specialised equipment to test them ie the CPUand the RAM if could save a new mobo and a lot of grief because I do know where you are stuck - in some hell hole of a creek without a paddle.

I do feel sorry you are stuck between that rock and hard place but don't give up just yet.
John
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01 Sep 2017   #69
amoretam

Windows 7 x64bit Home Premium
 
 

I do not understand, isn't it obvious that the mobo is the issue after doing what I did. ?
My System SpecsSystem Spec
01 Sep 2017   #70
ICIT2LOL

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

Quote   Quote: Originally Posted by amoretam View Post
I do not understand, isn't it obvious that the mobo is the issue after doing what I did. ?
Yes mate look I truly can understand your frustration - but you say starting from scratch nothing works as soon as you start a bare bons set up and yes that is suggestive of a board issue. All I am saying is that even if you found a replacement board if you stuck all that gear back on and it still will not go then you have done your dough.

I look at it like this you have a car now the engine is tuned and running, the transmission is fine, the final drive is great, the wheels and tyres all perfect, the doors all open and shut , the steering is spot on but if the brakes are shot you cannot driver what is in all likelihood a very nice car.

So with your machine getting for the sake of getting machines individual components tested out it means a complete rebuild.

I don't know if a techie store could test up that board you have a good one should) but it is getting on though having said that my Sandy is alive and well and eating 10 for breakfast.

Now I have been looking around to replace my Ivy B with a Skylake set up as it seems that any Kabylake stuff is not 7 compatible and the parts unless you want a really high end set up for gaming or graphical use then you are going to need a mortgage. On the other hand if all you want is a general use everyday machine then you are still going to be up for a considerable amount of money over and above what you paid for the Sandy. Prices and availability (out here at least) are eye wateringly awful and form my usual vendors hard to get anything approaching what I can afford. In the US of course you have much more choice and outlets and the prices are by comparison to us a steal but again I know you are between a rock and hard place and I fully sympathise with you but that is what I would be doing before I bin the board and possibly the lot.
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