Computer turning off spontaneuously

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Bourbons3

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#1 Bourbons3
Member since 2003 • 24238 Posts
My computer keeps turning itself off at random points. Sometimes it won't even turn on properly to start with. I press the on button, it starts whirring and the power light is on, but all the monitor says is "No video input", as if I had only turned the screen on. Anyone know what causes this, and how I can fix it? Thanks
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musclesforcier

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#2 musclesforcier
Member since 2004 • 2894 Posts
Thats kind of vague, we need more information.
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Bourbons3

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#3 Bourbons3
Member since 2003 • 24238 Posts
Thats kind of vague, we need more information.musclesforcier
Like what?
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musclesforcier

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#4 musclesforcier
Member since 2004 • 2894 Posts
What are your specs, what computer do you have if its prebuilt, have you added any new hardware lately, etc.
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dirktu

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#5 dirktu
Member since 2005 • 717 Posts

My computer keeps turning itself off at random points. Sometimes it won't even turn on properly to start with. I press the on button, it starts whirring and the power light is on, but all the monitor says is "No video input", as if I had only turned the screen on. Anyone know what causes this, and how I can fix it? ThanksBourbons3

Well I don't really understand 'the completely random part' in combination with the 'no video input' part... If it is somewhat random (i.e. sometimes in Windows, sometimes it won't reboot etc.) then it is probably a heat issue.. (and you could start cleaning the inside of your PC).

The 'no video' input could be anything related or not related to the previous problem; it could be a really overheated GPU (related but GPU are normally designed to be a lot hotter than the rest of your PC), a badly connected monitor, a monitor which is wrongly connected (there is a difference between the VGA and digital output;)), a faulty monitor etc.. Just try to eliminate some of these options by trying some of them.

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agallo

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#6 agallo
Member since 2003 • 844 Posts
An issue like that happend to me and it was my power supply.
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twittman

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#7 twittman
Member since 2005 • 106 Posts
Also make sure your CPU heatsink isn't clogged with dust, it happened to me once ^_^ computer kept restarting randomly.
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Bourbons3

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#8 Bourbons3
Member since 2003 • 24238 Posts
I just checked everything was plugged in and cleaned it all out. It had just turned froze after making lots of hissing and bleeping sounds. I installed new RAM about 3 weeks ago, but I don't remember the PC doing this at the time.
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vfibsux

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#9 vfibsux
Member since 2003 • 4497 Posts

Since it was not doing it before you installed the new RAM that likely is the culprit, faulty ram can reboot you. Power supply problems will do this as well, I would put overheating last on the list, usually you get graphics glitches with that as well.

How much ram did you add? What power supply are you using? Take the new RAM out and see if it still does it.

Either A) Ram is bad

B) Power supply was just enough before, now with added RAM was just enough to take it over the edge.

My guess.

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Bourbons3

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#10 Bourbons3
Member since 2003 • 24238 Posts

Since it was not doing it before you installed the new RAM that likely is the culprit, faulty ram can reboot you. Power supply problems will do this as well, I would put overheating last on the list, usually you get graphics glitches with that as well.

How much ram did you add? What power supply are you using? Take the new RAM out and see if it still does it.

Either A) Ram is bad

B) Power supply was just enough before, now with added RAM was just enough to take it over the edge.

My guess.

vfibsux
I upgraded from 512mb to 1Gb. How do I find out about my power supply?
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--Anna--

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#11 --Anna--
Member since 2007 • 4636 Posts

I just checked everything was plugged in and cleaned it all out. It had just turned froze after making lots of hissing and bleeping sounds. I installed new RAM about 3 weeks ago, but I don't remember the PC doing this at the time.Bourbons3

The bleeping sounds you mentioned above, could be important. If there is a pattern to them, when you boot-up, it could be the beep-code of your MB. If you remember the beeps, you can look up there meaning in your manual or the online manual for your MB. It can tell what the problem is !

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#12 BEAN_LARD_MULCH
Member since 2006 • 4720 Posts
Try taking out the ram and seeing if it fixes
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Miles0T0Prower

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#13 Miles0T0Prower
Member since 2007 • 1990 Posts
overheating happend to me. I ended did up forgetting thermal paste
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vfibsux

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#14 vfibsux
Member since 2003 • 4497 Posts
[QUOTE="vfibsux"]

Since it was not doing it before you installed the new RAM that likely is the culprit, faulty ram can reboot you. Power supply problems will do this as well, I would put overheating last on the list, usually you get graphics glitches with that as well.

How much ram did you add? What power supply are you using? Take the new RAM out and see if it still does it.

Either A) Ram is bad

B) Power supply was just enough before, now with added RAM was just enough to take it over the edge.

My guess.

Bourbons3

I upgraded from 512mb to 1Gb. How do I find out about my power supply?

Open the case and look at it. It is where you plug your power cord in, will be a 3 digit number with a "w" or watts at the end. Like "400w". Also like I said, take the ram you put in out and see if it continues. Might be the RAM. How did you figure out what to buy? I take it you guessed based on your level of PC knowledge?

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choctawfootball

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#15 choctawfootball
Member since 2003 • 766 Posts

it could be so many problems.

1. bad motherboard.

2. fan has gone out, and the pc shuts down to protect itself.

3. bad power supply.

4. loose connection.

5. virus

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Bourbons3

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#16 Bourbons3
Member since 2003 • 24238 Posts
[QUOTE="Bourbons3"][QUOTE="vfibsux"]

Since it was not doing it before you installed the new RAM that likely is the culprit, faulty ram can reboot you. Power supply problems will do this as well, I would put overheating last on the list, usually you get graphics glitches with that as well.

How much ram did you add? What power supply are you using? Take the new RAM out and see if it still does it.

Either A) Ram is bad

B) Power supply was just enough before, now with added RAM was just enough to take it over the edge.

My guess.

vfibsux

I upgraded from 512mb to 1Gb. How do I find out about my power supply?

Open the case and look at it. It is where you plug your power cord in, will be a 3 digit number with a "w" or watts at the end. Like "400w". Also like I said, take the ram you put in out and see if it continues. Might be the RAM. How did you figure out what to buy? I take it you guessed based on your level of PC knowledge?

I bought a piece of RAM the same as the piece already in there.
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vfibsux

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#17 vfibsux
Member since 2003 • 4497 Posts
Ok man, well did you do as we suggested and take the new RAM back out to see if it continues? While you are in there take note of the power supply brand and wattage.
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Bourbons3

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#18 Bourbons3
Member since 2003 • 24238 Posts
It turned on fine without the extra piece of RAM, but then it doesn't always have a problem with two pieces in there. The PSU is a Hipro, and says that depending on the voltage it has a maximum of 165 or 280w. I typed in the model number to google and didn't get anything useful.
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#19 nohabs
Member since 2004 • 10797 Posts

It turned on fine without the extra piece of RAM, but then it doesn't always have a problem with two pieces in there. The PSU is a Hipro, and says that depending on the voltage it has a maximum of 165 or 280w. I typed in the model number to google and didn't get anything useful.Bourbons3

Thats way too low. Time to upgrade

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vfibsux

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#20 vfibsux
Member since 2003 • 4497 Posts

It turned on fine without the extra piece of RAM, but then it doesn't always have a problem with two pieces in there. The PSU is a Hipro, and says that depending on the voltage it has a maximum of 165 or 280w. I typed in the model number to google and didn't get anything useful.Bourbons3

Holy crap. That is your problem. You need a new one, I imagine you don't have a super system so you could probsably get away with a 350w or 400w one. Not that I would normally recommend that, but I imagine if you had all kinds of money to buy new stuff you would not have what you have.

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Bourbons3

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#21 Bourbons3
Member since 2003 • 24238 Posts

[QUOTE="Bourbons3"]It turned on fine without the extra piece of RAM, but then it doesn't always have a problem with two pieces in there. The PSU is a Hipro, and says that depending on the voltage it has a maximum of 165 or 280w. I typed in the model number to google and didn't get anything useful.vfibsux

Holy crap. That is your problem. You need a new one, I imagine you don't have a super system so you could probsably get away with a 350w or 400w one. Not that I would normally recommend that, but I imagine if you had all kinds of money to buy new stuff you would not have what you have.

And any power supply with a higher wattage will work? It doesn't need to be specially compatible or anything?
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musclesforcier

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#22 musclesforcier
Member since 2004 • 2894 Posts
Don't just get any power supply. Just because one has higher voltage doesnt mean its good. If your looking for a cheap replacement don't go for anything less then the Antec Earthwatts 430. Its like $70 on newegg.com
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#23 shanelevy
Member since 2004 • 1316 Posts
earthwatts ftw. Depending on your vid card you could probably get the 380 versian.
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Bourbons3

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#24 Bourbons3
Member since 2003 • 24238 Posts
What minimum wattage should I be getting? 380w?
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#25 george_hopkins
Member since 2005 • 1397 Posts
Download speedfan and check your temperatures to rule out overheating. And yea your power supply is crap.
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#26 george_hopkins
Member since 2005 • 1397 Posts

What minimum wattage should I be getting? 380w?Bourbons3

Depends on your graphics card.

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Bourbons3

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#27 Bourbons3
Member since 2003 • 24238 Posts

[QUOTE="Bourbons3"]What minimum wattage should I be getting? 380w?george_hopkins

Depends on your graphics card.

Its an ATI Radion XPress 200 series, 64mb.
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Bourbons3

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#28 Bourbons3
Member since 2003 • 24238 Posts
Download speedfan and check your temperatures to rule out overheating. And yea your power supply is crap.george_hopkins
Speedfan keeps changing. On one reading ity went from -10 to 115 in a split second... What sort of temperatures should I be expecting?