Solved

Random Shutdown (Power Off, Not Reboot)

Posted on 2006-07-22
27
271 Views
Last Modified: 2010-04-25
I acquired a Dell Dimension 4600 that had been electrically damaged in a thunderstorm. The PC randomly shuts down (powers off, does not reboot). Replaced power supply and installed new motherboard. Behavior did not change. What should be done next?
0
Comment
Question by:BubbaJNelson
  • 8
  • 4
  • 4
  • +2
27 Comments
 
LVL 23

Assisted Solution

by:phototropic
phototropic earned 150 total points
ID: 17161281
Check the power switch on the case.
Check the case for any chance of a short between the M/board and the case metal.
How long does it run before it powers off? If it happens quickly, try running the board outside the case for a while...
Unplug any front USB or front audio connectors.
It would be cheaper to replace an ATX case than almost any other component...
0
 

Author Comment

by:BubbaJNelson
ID: 17161517
I have checked for shorts between motherboard and case. None.

The PC runs for a few minutes, a few hours, or sometimes for most of a day before it suddenly powers off. This is seemingly random behavior.

I tried your suggestion to  unplug the front mounted sound and USB ports. Behavior did not change.

How does one check the power switch?
0
 
LVL 23

Assisted Solution

by:phototropic
phototropic earned 150 total points
ID: 17161605
Easiest way would be to disconnect the power switch from the m/board terminals, then power on the pc by shorting the terminals with a small screwdriver. If the machine still powers off randomly with the switch disconnected, you can rule out the power switch as a cause.
Could this be an overheating issue.? Next time it powers off, log back on immediately and check the CPU temp. in the BIOS.
0
Problems using Powershell and Active Directory?

Managing Active Directory does not always have to be complicated.  If you are spending more time trying instead of doing, then it's time to look at something else. For nearly 20 years, AD admins around the world have used one tool for day-to-day AD management: Hyena. Discover why

 
LVL 26

Expert Comment

by:PCBONEZ
ID: 17162069
A bad power switch is not likely to cause a shutdown when it's already running.

Did you replace the modem, network card, video card?
Check all of the above for swollen caps or charred components.
http://www.badcaps.net/ident/
0
 
LVL 23

Expert Comment

by:phototropic
ID: 17162690
PCBONEZ,
You are quite right that abad pwr switch is unlikely to cause a problem. However, I have seen a faulty reset switch cause a similar problem to this...we disconnected the reset switch and the problem went away.
BubbaJNelson,
Have you tried booting the machine without expansion cards? Does your new m/board have integrated video?
0
 
LVL 92

Expert Comment

by:nobus
ID: 17162876
>>  Replaced power supply and installed new motherboard  << did you use the same CPU ? it can be damaged too.
You can test it out on another compatible mobo
0
 
LVL 92

Expert Comment

by:nobus
ID: 17162880
and the same ram ? test it with memtest86+ from :  http://www.memtest.org/      
0
 

Author Comment

by:BubbaJNelson
ID: 17163972
I've booted the machine with all expansion cards and front panel connectors (sound, USB, etc.) removed. Behavior did not change.

Memory has been tested with Memtest86+. It's OK.

I've not yet tested the processor on another mobo and I've not checked the CPU temperature.
0
 
LVL 26

Expert Comment

by:PCBONEZ
ID: 17165732
The same CPU as when the storm hit?
I didn't catch that...
Yes, check the CPU next.......
0
 

Author Comment

by:BubbaJNelson
ID: 17306073
I replaced the CPU with a known good one (appropriate for the mobo). All kinds of hardware errors resulted. I have decided that the machine is jinxed. I give up.
0
 
LVL 26

Expert Comment

by:PCBONEZ
ID: 17306217
Try with some known good memory in there and a known good video card with everything else disconnected.
Everything connected is new (since the damage) at that point so if it won't fire one of your known good's wasn't so good.
If it does fire re-connect things one at a time to determine which parts have gone foey.
0
 
LVL 92

Assisted Solution

by:nobus
nobus earned 150 total points
ID: 17308318
probably the motherboard is causing it. In such cases, i test the devices on another system, before making a conclusion.
0
 
LVL 88

Expert Comment

by:rindi
ID: 17389879
Any news, Bubba?
0
 

Author Comment

by:BubbaJNelson
ID: 17392674
I want to replace the mobo with one from Intel (D865PESO) but can't find one (eBay, Google, Yahoo, etc.). The processor requires the Intel 865 chipset and the case requires a mirco-ATX mobo. I considered non-Intel but couldn't find all the features I want such as AGP, Ethernet, dual channel memory, etc. What's your thinking on this?
0
 
LVL 88

Expert Comment

by:rindi
ID: 17392977
I think you just need to check now and then on ebay or wherever.
0
 
LVL 92

Expert Comment

by:nobus
ID: 17394833
you can always try a cheap dell instead
0
 
LVL 88

Expert Comment

by:rindi
ID: 17468789
Any news?
0
 
LVL 88

Expert Comment

by:rindi
ID: 17563249
Hello, bubba?
0
 

Author Comment

by:BubbaJNelson
ID: 17564212
I'm still shopping for an Intel mobo.
0
 
LVL 26

Accepted Solution

by:
PCBONEZ earned 200 total points
ID: 17564729
0
 

Author Comment

by:BubbaJNelson
ID: 17565158
That's it. Thanks.
0
 

Author Comment

by:BubbaJNelson
ID: 17619195
Intel D865PESO mobo arrived yesterday. It replaced the stock Dell mobo. The PC has been running continuously for 15 hours. So far, so good.
0
 

Author Comment

by:BubbaJNelson
ID: 17670551
The PC continues to run. I can close the Q. Thank you.
0

Featured Post

Is Your AD Toolbox Looking More Like a Toybox?

Managing Active Directory can get complicated.  Often, the native tools for managing AD are just not up to the task.  The largest Active Directory installations in the world have relied on one tool to manage their day-to-day administration tasks: Hyena. Start your trial today.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

How can this article save you time AND money?  In just a few minutes you may discover something you didn't know existed that is easy enough for you to fix yourself!
This Micro Tutorial demonstrates using Microsoft Excel pivot tables, how to reverse engineer competitors' marketing strategies through backlinks.
A short tutorial showing how to set up an email signature in Outlook on the Web (previously known as OWA). For free email signatures designs, visit https://www.mail-signatures.com/articles/signature-templates/?sts=6651 If you want to manage em…

772 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question