Windows 8 and 8.1 Forums


computer wont turn on, no lights, no life

  1. #11


    Sydney, Nova Scotia, Canada
    Posts : 6,490
    Windows 10 Education 64 Bit


    Just so you know. When using the screwdriver to short out the two power button pins on the motherboard. You don't have to hold it there, a momentary touch is all you need.
    When trouble shooting something like this, this is what I do.
    Remove everything not needed for the PC to post. All you need is the Power supply, motherboard with CPU and one stick of RAM. If it has onboard video use that. Reset the BIOS to defaults with the jumper. Unplug all external peripherals except the keyboard and monitor. Also unplug all the hard drives and any optical drives. Remove any unneeded add in cards, the video card should be the only one you need if it doesn't have any onboard video. You may even want to unplug and audio or USB case headers incase one has shorted out. It sounds like a lot of work but if it boots you won't regret it. If it does boot up, then you add things back in one at a time and see if it quits again.

    A shorter preemptive strike to the above is to reseat everything. Reseat your RAM modules, Video card and any other add in cards. Double check the power and data cables to your drives to make sure they are plugged in firmly. Check the cables that go to the case audio jacks and USB ports to make sure they haven't shorted out on any sharp edges etc.

      My System SpecsSystem Spec

  2. #12


    Harrisonburg, Va.
    Posts : 10,488
    Windows 8.1.1 Pro with Media Center


    Why not go to Radio Shack or somewhere & get a circuit tester ?
      My System SpecsSystem Spec

  3. #13


    Sydney, Nova Scotia, Canada
    Posts : 6,490
    Windows 10 Education 64 Bit


    Odds are if it is a failure its' the motherboard, or CPU. You've already swapped power supplies right? Just about anything else will give you a BIOS Beep code. Even the CPU unless its completely blown. It sounds like a short somewhere. Circuitry in the motherboard turns the power supply on. The Power supply has overload and short circuit protection built in. If there is a short somewhere it will not turn on.
      My System SpecsSystem Spec

  4. #14


    Southern California
    Posts : 788
    Windows 8.1 Pro with Media Center x64


    Quote Originally Posted by caperjack View Post
    [...]you should be able to follow wires from the case power button to the motherboard ,on the motherboard it would plug into a series of pins that are marked but with very small lettering ,you would have to determine what 2 are for the power[usually marked with PSW]and take a small screwdriver and jump the 2 pins ,the screwdriver becomes the switch
    It wasn't marked because the wires were bundled together, but I did what was recommended to all of them, since I wasn't sure which was which lol. I have built computers before, so at least I knew which direction to do it in.

    Quote Originally Posted by Edwin View Post
    Just a stab in the dark, but what about resetting the CMOS?
    I moved the jumper. This made me think of the motherboard battery, so I replaced it with a brand new one to no joy. Also jumped the BIOS, they were separate.

    Quote Originally Posted by alphanumeric View Post
    Just so you know. When using the screwdriver to short out the two power button pins on the motherboard. You don't have to hold it there, a momentary touch is all you need.
    When trouble shooting something like this, this is what I do.
    Remove everything not needed for the PC to post. All you need is the Power supply, motherboard with CPU and one stick of RAM. If it has onboard video use that. Reset the BIOS to defaults with the jumper. Unplug all external peripherals except the keyboard and monitor. Also unplug all the hard drives and any optical drives. Remove any unneeded add in cards, the video card should be the only one you need if it doesn't have any onboard video. You may even want to unplug and audio or USB case headers incase one has shorted out. It sounds like a lot of work but if it boots you won't regret it. If it does boot up, then you add things back in one at a time and see if it quits again.

    A shorter preemptive strike to the above is to reseat everything. Reseat your RAM modules, Video card and any other add in cards. Double check the power and data cables to your drives to make sure they are plugged in firmly. Check the cables that go to the case audio jacks and USB ports to make sure they haven't shorted out on any sharp edges etc.
    Unplugged everything not important for it to start, including audio, USB, etc. All cords secure. I didn't remove the front cover, but I will in a little bit to get a closer look at the cords from the power button to the motherboard. It is one of those not-so-easy-to-remove ones. No additional cards, uses the i3 on board graphics. I may also test the computer's PSU on another computer to ensure that it has no problem, as I've already tried a brand new PSU on the computer to no avail.

    Quote Originally Posted by David Bailey View Post
    Why not go to Radio Shack or somewhere & get a circuit tester ?
    I've not had experience with these, and most likely will never need it again. It is a great idea, but I probably won't be making the purchase. Thanks for the thought!

    Quote Originally Posted by alphanumeric View Post
    Odds are if it is a failure its' the motherboard, or CPU. You've already swapped power supplies right? Just about anything else will give you a BIOS Beep code. Even the CPU unless its completely blown. It sounds like a short somewhere. Circuitry in the motherboard turns the power supply on. The Power supply has overload and short circuit protection built in. If there is a short somewhere it will not turn on.
    I was thinking motherboard myself. Come to think of it, this computer comes from a family that probably doesn't think twice about plugging directly into the wall, so a power surge is a big probability. If this is the case, is it possible to toss the motherboard away and salvage everything else hardware, including the CPU? Probably have to end up slowly testing each component, which above all other computer problems, is the thing I hate most lol.Thanks for everyone's replies, and any more suggestions still welcome as I continue my search.
      My System SpecsSystem Spec

  5. #15


    Posts : 2,627
    win8.1.1 enterprise


    it would be worth a try as for saving the parts to put into another motherboard ,but I myself would not pay to much for a motherboard just to try and find out nothing was any good
      My System SpecsSystem Spec

  6. #16


    Southern California
    Posts : 788
    Windows 8.1 Pro with Media Center x64


    Kerry, I don't have a monitor or keyboard attached because they are not easily accessible, since I just borrowed the computer to test it. This shouldn't pose a problem... right? Also reseated the RAM. Forgot to mention this in my last post.

    Jack, Thanks for the suggestions. I'll have to ensure the salvaged parts work before recommending any new purchases of parts^^
      My System SpecsSystem Spec

  7. #17


    Posts : 2,627
    win8.1.1 enterprise


    un plug the power from the wall outlet before you try this .

    you can test the power supply by jumping the green wire and one of the black ground wires with a large paper click with tape on it for safety reasons, I use to use a piece of black wire with the coating still on it , unplug the large plug into the motherboard .you just put the wire in the green and black holes .then plug the psu into the wall outlet ,it will turn on if the psu works,it will run any fans or cdrom drive and such plugged into it ,this will ruel out the psu and put the likely case to the motherboard
    short video from youtube .
    https://www.youtube.com/watch?v=iVt3nYv4zlU
      My System SpecsSystem Spec

  8. #18


    Quote Originally Posted by caperjack View Post
    un plug the power from the wall outlet before you try this .

    you can test the power supply by jumping the green wire and one of the black ground wires with a large paper click with tape on it for safety reasons, I use to use a piece of black wire with the coating still on it , unplug the large plug into the motherboard .you just put the wire in the green and black holes .then plug the psu into the wall outlet ,it will turn on if the psu works,it will run any fans or cdrom drive and such plugged into it ,this will ruel out the psu and put the likely case to the motherboard
    short video from youtube .
    https://www.youtube.com/watch?v=iVt3nYv4zlU
    That's a great tip. Eliminate the motherboard. If the supply turns on then you know it's the board or CPU. Thank you.
      My System SpecsSystem Spec

  9. #19


    Southern California
    Posts : 788
    Windows 8.1 Pro with Media Center x64


    Yes, very good tip. Both the newer and old PSUs worked by spinning their fans, so I guess that rules the PSU out completely. That would mean that power is not getting 'back' to the PSU from the motherboard, right? Meaning not the CPU?

    I am having tremendous difficulty in removing the cover (besides the main side panel) of the case lol. Dell computers are easier to open.
      My System SpecsSystem Spec

  10. #20


    Posts : 2,627
    win8.1.1 enterprise


    Quote Originally Posted by DustSailor View Post
    . Dell computers are easier to open.
    yeah, they always were ,I have 2 here and its just the flick of a switch and the case pops open
      My System SpecsSystem Spec

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computer wont turn on, no lights, no life
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