# Computer Question : Auto shutoff ?

**URL:** <https://boards.straightdope.com/t/computer-question-auto-shutoff/279786>\
**Category:** Factual Questions\
**Created:** [December 14, 2004, 3:12pm UTC](https://boards.straightdope.com/t/computer-question-auto-shutoff/279786 "2004-12-14T15:12:44Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![Ponster](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/ponster/32/17081_2.png) [@Ponster](https://boards.straightdope.com/u/Ponster)\
**Post date:** [December 14, 2004, 3:12pm UTC](https://boards.straightdope.com/t/computer-question-auto-shutoff/279786/1 "2004-12-14T15:12:44Z")

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I’m just building my new computer and have hit a snag.

I’ve inserted the CPU (AMD64 3200), installed a Zalman CPU fan and put the lot into the case (Antec 350watt)

The problam is that when I switch on the power supply the LED on the board lights up, but when I switch on the machine, the power supply dies after about 1 second. I can hear the hard drive turning and see the CPU fan spinning during this second, but then everything stops.

I’ve plugged everything out (hard drive/CD ROM) and the memory is fine.

The contact is fine between the fan and the processor.

It looks as though the motherboard (ASUS) is telling the power to switch off but I have no idea as to why?

Any help here?

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**Author:** ![DougC](https://avatars.discourse-cdn.com/v4/letter/d/7feea3/32.png) [@DougC](https://boards.straightdope.com/u/DougC)\
**Post date:** [December 14, 2004, 5:45pm UTC](https://boards.straightdope.com/t/computer-question-auto-shutoff/279786/2 "2004-12-14T17:45:16Z")

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- 
  - 
    - The motherboad manual should give troubleshooting tips, look for the ones concerning auto-powering-off during startup. (I tend to order my mobos as CPU+mobo+ram bundles, tested \<;) )  
~

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**Author:** ![midget](https://avatars.discourse-cdn.com/v4/letter/m/90db22/32.png) [@midget](https://boards.straightdope.com/u/midget)\
**Post date:** [December 14, 2004, 5:54pm UTC](https://boards.straightdope.com/t/computer-question-auto-shutoff/279786/3 "2004-12-14T17:54:14Z")

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Obvious question, but do you have the right voltage selected at the back of the power supply? Are you sure your CPU and memory are compatible with that motherboard?

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**Author:** ![Ponster](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/ponster/32/17081_2.png) [@Ponster](https://boards.straightdope.com/u/Ponster)\
**Post date:** [December 16, 2004, 10:43am UTC](https://boards.straightdope.com/t/computer-question-auto-shutoff/279786/4 "2004-12-16T10:43:56Z")

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Thx for the help people !

The side case wasn’t fixed properly and wouldn’t boot up until the case was closed 🙂