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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.




Attached Thumbnails
Computer is shutting down randomly-temp.png  
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1 Week Ago   #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
1 Week Ago   #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.
My System SpecsSystem Spec
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1 Week Ago   #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
1 Week Ago   #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
1 Week Ago   #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
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