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Cant Open My Pc Even Though the power supply is OK

I had this problem the other day, when i was running my pc... When I turned it on,,, the lights on the switch on blinked and my pc runned for only 1 second then i started reconnecting things like the MEMORY CARd the proccerssor the power cables everthing and when i tried it again,, it worked but then suddenly my monitor's light behind its switch are blinking and i turned my cpu on and off then... after the fifth time i am turning my pc.. it does not turn on. My power supply is working because i tested it on the other computer.. I cant Figure out my problem so please help me..

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  • tina14 May 23, 2009

    I had this problem the other day, when i was running my pc... When I turned it on,,, the lights on the switch on blinked and my pc runned for only 1 second then i started reconnecting things like the MEMORY CARd the proccerssor the power cables everthing and when i tried it again,, it worked but then suddenly my monitor's light behind its switch are blinking and i turned my cpu on and off then... after the fifth time i am turning my pc.. it does not turn on. My power supply is working because i tested it on the other computer.. I cant Figure out my problem so please help me..

  • Anonymous May 23, 2009

    i have same issue

  • John Snow
    John Snow May 11, 2010

    If you unhook everything and leave just the memory and the CPU in the motherboard, what happens then?

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Remove the battery on mother body with the small clips on mother body and returned it back
and also check the cables from mother body to hard disk and cables from power to mother body remove it and returned it back.
other wise you must check the mother body its working or not if its not working you must to change mother body or buy a new pc.

Posted on Jul 17, 2013

  • said yahya saleh
    said yahya saleh Jul 17, 2013

    remove the battery on mother body with the small clips on mother body and returned it back
    and also check the cables from mother body to hard disk and cables from power to mother body remove it and returned it back.
    other wise you must check the mother body its working or not if its not working you must to change mother body or buy a new pc.


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Had this problem the other day, when i was running my pc... When I turned it on,,, the lights on the switch on blinked and my pc runned for only 1 second then i started reconnecting things like the MEMORY CARd the proccerssor the power cables everthing and when i tried it again,, it worked but then suddenly my monitor's light behind its switch are blinking and i turned my cpu on and off then... after the fifth time i am turning my pc.. it does not turn on. My power supply is working because i tested it on the other computer.. I cant Figure out my problem so please help me..

Posted on May 24, 2009

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1 Answer

What causes a pc motherboard cannot turn on ?


Do any lights come on at the case? eg at the front or on the port where the network cable is plugged in.
Does the psu fan spin when turned on?
If you can open the case, there is usually a green(?) led on the motherboard that lights up when powered on.
If nothing is happening, it could be your power supply. Try swapping it with a spare one (check that it is a standard pin layout.
Look at ebay, local pc store etc for a cheap atx psu tester to see it the power supply is ok. Or google how to jump start a pc power supply with a paperclip and/or test with a cheap multimeter - usually with the green and black wire from memory. (careful playing with electricity though and read up on how to not short out your computer and damage something else).
Otherwise, the motherboard itself may be dead.

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My hp pavilion a430n is not turning on. even though i pressed the power button the light wont even turn on. it is truly annoying and the screen says something about the power supply and green, red, blue...


I suggest to open your computer and unplug your power supply and look for the color green and black cord which plugged from your motherboard. Then find a piece of wire and short the color green and black wire to test if your power supply is working and plug to your power socket. And check your electronic parts (capacitor) near at your processor, it might your capacitor blown out.

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Yes, definitely. You need to change your power supply.

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Emachine 3240 possible power problem?


I would suggest try to swap the power supply out with another known good power supply.

I've seen where even though the light on the motherboard is lit, it is not getting enough power to start the machine up, especially if you have a higher end video card connected to it.


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Powers on and turns off 10 - 20 seconds ?????


Check the power supply first, unplup the cd dcd components and try your pc this way,
Check the cpu fan also as this sounds as if the cpu is reaching critical heat ranga and is shutting down the system to protect it self

Dec 19, 2008 | Bestec (ATX-250-12E) 250-Watt Power Supply

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Computer isnt running


If that is the case your system need to check the battery for fault and does it happen with the power source too i fthe same problem check your processor fan if its bad when you on the system and is not blowing that might have cause the processor itself to get bad you will have to change this ones and then your system will be ok right rate this solution.

Nov 27, 2008 | Toshiba Satellite A205-S4617 Notebook

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The light


If you cant turn it on then its probably a bad power supply. So i would bring it to your local pc shop, a power supply for a regular home computer shouldnt run to much, and labor for it should be less than 1 hour. So you could get away with around 100.00.

If i read your last message wrong and you can turn it on, then do as i suggested and test the voltage read, but if its clicking, then somethings wrong, computers only click when somethings broken.

Aug 07, 2008 | Computers & Internet

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No juice


Sounds like a battery issue. Try powering up without the battery, just AC. If it powers properly, then the battery needs replaced. If it doesn't then it may be the power supply malfunctioning, or the motherboard.

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2 Answers

Won't Turn On


Yes, It shows the board is getting power (maybe not enough though)
Since I can not see your computer, run through this checklist from Dell, Let me know how you make out.

http://support.dell.com/support/topics/global.aspx/support/dsn/en/tree?c=us&l=en&s=gen&journalid=40D4258B12DC06C9E040A68F732810A7&treeid=011360B8243248349C306481A954B356&Query=bm8rcG93ZXI=&SystemID=DIM_P4_4600&ServiceTag=&contenttype=-1&os=-1&component=-1&lang=-1&doclang=en&toggle=true&dl

I would without seeing it that the PSU is bad.

Dec 09, 2007 | Dell Dimension 4600 PC Desktop

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