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[PROBLEM SOLVED!!]Mistery - for experts only :) Computer shutdowns without any reason

C

cotonetes

Junior Member
Hi Guys,

I have a problem annoying me quite a long time. My computer shuts dow without any warning. I mean, no windows xp shutdow, is like unpluging from main power, it just dies.

I just can´t define a scenario where I can reproduce (and try to fix) the issue.

I already started to work with computer and it died just 20 minutes after, and also took all the day to die.

Right now i let Stress Prime Orthos running more than 2 hours, and stays rock solid! My guess is :

a) the power suplies for some ramdom condition (faulty condition) just activate some internal protection circuit and shuts the computer down.

b) some peripheral tell the power suplie to shutdwon, because some false overheating condition (faulty sensor ?)

If some of you guys had passed trough similar experience, I would be glad to hear what you did to fix the problem.

To help, follow my computer hw settings


SiSoftware Sandra

System
Host Name : Cotonetes
User : Cotonetes
Workgroup : WORKGROUP

Processor
Model : AMD Athlon(tm) 64 Processor 3700+
Speed : 2.21GHz
Model Number : 3700 (estimated)
Cores per Processor : 1 Unit(s)
Threads per Core : 1 Unit(s)
Internal Data Cache : 64kB Synchronous, Write-Back, 2-way set, 64 byte line size
L2 On-board Cache : 1MB ECC Synchronous, Write-Back, 16-way set, 64 byte line size

Mainboard
Bus(es) : ISA PCI PCIe IMB USB FireWire/1394 i2c/SMBus
MP Support : 1 Processor(s)
MP APIC : Yes
System BIOS : Phoenix Technologies, LTD 6.00 PG
Mainboard : NF-CK804 (Chaintech VNF4 Ultra)
Total Memory : 2GB DDR-SDRAM

Chipset 1
Model : Advanced Micro Devices (AMD) Athlon 64 / Opteron HyperTransport Technology Configuration
Front Side Bus Speed : 2x 1005MHz (2010MHz data rate)
Total Memory : 2GB DDR-SDRAM
Memory Bus Speed : 2x 200MHz (400MHz data rate)

Video System
Monitor/Panel : SyncMaster 997DF/927DF/997MB/927MB/927DFI
Adapter : NVIDIA GeForce 7800 GTX
Imaging Device : VIMICRO USB PC Camera (ZC0301PLH)

Physical Storage Devices
Removable Drive : Floppy disk drive
Hard Disk : ST3160827AS (149GB)
CD-ROM/DVD : _NEC DVD_RW ND-3520A (CD 48X Rd, 48X Wr) (DVD 6X Rd, 6X Wr)

Logical Storage Devices
Primario (C🙂 : 29GB (13GB, 43% Free Space) (NTFS)
Secundario (D🙂 : 79GB (19GB, 24% Free Space) (NTFS)
MP3 (E🙂 : 387MB (CDFS)
3.5" 1.44MB (A🙂 : N/A

Peripherals
Serial/Parallel Port(s) : 2 COM / 1 LPT
USB Controller/Hub : Standard OpenHCD USB Host Controller
USB Controller/Hub : Standard Enhanced PCI to USB Host Controller
USB Controller/Hub : USB Root Hub
USB Controller/Hub : USB Root Hub
FireWire/1394 Controller/Hub : OHCI Compliant IEEE 1394 Host Controller
Keyboard : Standard 101/102-Key or Microsoft Natural PS/2 Keyboard
Mouse : HID-compliant MX510 Optical Mouse
Human Interface : Logitech USB MX510 Optical Mouse

MultiMedia Device(s)
Device : NVIDIA(R) nForce(TM) Audio Codec Interface
Device : Creative SB Audigy 2 ZS (WDM)
Device : Creative Game Port

Power Management
Mains (AC) Line Status : On-Line

Operating System(s)
Windows System : Microsoft Windows XP/2002 Professional 5.01.2600 (Service Pack 2)
Platform Compliance : Win32 x86

Network Services
Network Drivers Enabled : No

Performance Tips
Warning 100 : Large memory sizes should be made of Registered/Buffered memory.
Tip 2546 : Large memory modules should be ECC/Parity.
Notice 5901 : CD 1x= 150kB/s; Exercise caution when comparing measured versus published ratings.
Notice 5902 : DVD 1x= 11.08Mbps Exercise caution when comparing measured versus published ratings.
Tip 2 : Double-click tip or press Enter while a tip is selected for more information about the tip.
 
First off - Welcome to the Forums 🙂


What is your Power Supply?

Do you have the extra power cable (4 pin) plugged into your Video Card?

Does your CPU fan and Chipset fan spin freely?

Check your Event log under Administrator tools to see if there are any indications as to why it's shutting down.

Pull your Sound Card out and see if you still have the problem.

Right off I suspect the PSU, but try the above and see if any of it helps.
 
Originally posted by: wanderer27
First off - Welcome to the Forums 🙂

[cotonetes]Thank You!


What is your Power Supply?

[cotonetes] Enermax EG465P-VE 24Pins


Do you have the extra power cable (4 pin) plugged into your Video Card?

[cotonetes] Yep, it came with the PS

Does your CPU fan and Chipset fan spin freely?

[cotonetes] Yep, and moreover, I changed BIOS settings to disable cool and quiet feature, run fans with max speed always

Check your Event log under Administrator tools to see if there are any indications as to why it's shutting down.
[cotonetes] Cheked, but didn´t find any serious issue, will take note of the time when next shutdown happens and check against event viewer

Pull your Sound Card out and see if you still have the problem.

[cotonetes] Good idea, will try with Sound Card and Video Card (each one at a time)

Right off I suspect the PSU, but try the above and see if any of it helps.

[cotonetes] Additional information, I have this computer more than a year, running well, this issue started to happen around 4 to 6 months ago


 
There's no doubt at all that your PS is the culprit, it's deliberating cutting off voltage due to what's probably a either a ground fault or an overload condition (other than due to ground, ie too much load for it's spec). If it didn't cut off power like this you might find yourself with some fried junk, it's a safety feature.
 
hey guys, despite all suspects, IS NOT THE PS !! I´ve bought a new one Huntkey 450W and the problem just remained with new PS, so is left only :
- motherboard
- CPU
- Video card

Memory I´ve already tested, and they are all right

Other test I´ve done is to short circuit do GROUND the PS pin that enables voltage to connectors. I was wondering, some way this pin is being pulled up by motherboard (may be a noise at the line ?) and the PS just shuts down. Well I´ve discovered that even keeping the PS always ON, the PC keeps shutting down. It just seems that CPU just turn it off itself (fans keep working because PS is always ON now).

Amazing, what in the hell tells to the CPU to shutdown itself ?

the root cause is not thermal as the power down is completely ramdom, can happen on first minutes or computer can be running all day after shutting down without notice.

any other clue you may have ?

TY
 
I can't check it at work, machines are locked down, but we had one that would do the same thing. There was a setting for XP to reboot on a program error but I don't rember where to find that control. Check the event log and see if the same program or service is running when it shuts down. Does it stay down or reboot and can it restart right away?
 
You might also get a version of Linux and either boot it from CD or install on a separate partition and run the system on that for a while to see if the problem still shows up.
 
I have an NF4 mb that has shutdown like that but usually when I'm changing RMClock settings.

Does SpeedFan report reasonable temps?

Don't see if OCing or not. I assume bios has been reset and default settings have been checked. Might try decreasing FSB/CPU multiplier to see if changes anything. Look at ram timings and v.

I've never seen this but others have mentioned the capacitors in the power regulation circuit around the cpu on some mb's start to bulge after a while.

Did anything change just before you first noticed the problem - new h/w, s/w, severe storm, etc.?

Check for malware?

Will orthos run longer than two hours? overnight? 24 hours?
 
no guys even loading BIOS SAFE MODE settings the problem remains 🙁 I´m almost buying a new mobo and CPU....

malvare : i have a image of my HD (did when I built PC and it was working fine), once did a test restoring it and the problem also remains. So is not a sw problem as well.

also never changed hw since I´ve built it.

hum, about bulged capacitors, I did a visual inspection and didn´t see any capacitor with increased size or something like that, but im not an expert 🙂
 
I had two Dell computers at work with the same symptoms...both had bulged capacitors. Replaced the boards and no problems ever since. Usually if they are bulged, the tops will be a little rounded instead of flat, and will also be a little fatter, kinda around the middle. You may also see a little white or yellowish crusty substance on top of them, coming thru the part that looks like an 'X'. I think they have to bulge a good bit to start leaking though.

IMO, it purtty much has to be the board at this point, even if no bulged capacitors. Especially if you've eliminated PSU, RAM, and any add-in cards from the equation.
 
The good news is that since the machine boots up normally odds are the cpu is ok ... & since you've eliminated the PSU I'd say its virtually certain the problem involves the motherboard ... I would try replacing it first.
 
Problem solved!! Not exactly the way I´ve imagined 🙁, but well that´s life....

I just replaced all the stuff, motherboard, CPU, and memos, bought this weekend an Athlon64 X2 6000+ with Abit AN52 and 2x1Giga Corsair XMS2 (running at ~800MHz). Running rock solid until now.

ps: and I agree with you, since is the most complex component (lots of ICs and circuits), probably is the one with lower MTBF (medium time before fail).

AND THANKS! TO ALL GUYS THAT TRIED TO HELP ME.
 
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