New build STILL wont turn on please help!

So, Ive put together my first build and it didnt turn on, so I plugged in a much crappier unit and I got farther but it didnt completely turn on (probably because the crappy unit wasnt plugged into the CPU power) So i sent back my psu and got my new one, plugged it in and the same thing happens! Ive gone way over budget can someone please help me?

Note: When the crappy unit was plugged into the 24 pin, smoke came out of the motherboard
video: https://www.youtube.com/embed/3nTu1Z5fqNU

Specs:
Antec 620HCG-620M psu
G. Skill Ripjaws X
H100i
i7-4790k
GTX 970
MSI z97 Gaming 7

Please help me ):
15 answers Last reply
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  1. Ok, slow down some. That Antec is an excellent psu, btw.

    1st, is there a power switch on the back of the psu.
    2nd, exactly which cables have you connected from the psu, list all please.
    3rd, when you say it won't turn on, does the pc do anything at all, fans spin, beeps from speaker (should have that tiny piezo system speaker plugged in)

    Edit.: ok, missed the edit. Check your motherboard standoffs. You should have had only 9 and all 9 must be screwed. If you missed on, and it's in a wrong hole, you could have shorted out the mobo.

    Check your psu cables, you should only be using the ones from the current psu, not old ones. They'll have different pin settings at the psu, even if the connectors physically fit.
  2. Karadjgne said:
    Ok, slow down some. That Antec is an excellent psu, btw.

    1st, is there a power switch on the back of the psu.
    2nd, exactly which cables have you connected from the psu, list all please.
    3rd, when you say it won't turn on, does the pc do anything at all, fans spin, beeps from speaker (should have that tiny piezo system speaker plugged in)


    Okay, Yes the switch in the back is on
    I have 2 cables going to my video card, and 2 cables, one being a Molex powering my my fans, another powering my two storage drives, an SSD and an HDD
    The pc makes a quiet whine and for a splint second the lights dim for a second then nothing happens when I press it again unless I clear the cmos or turn off the PSU.

    Edit: Note: In the video, the crappy unit is plugged into the 24 pin and when my new unit is plugged in those lights dont come on in the video.
  3. That sounds awfully like you have a dead short somewhere, and if that's the case then the Antec won't turn on as the overcurrent / overvoltage protections won't allow it to. Check the standoffs in the lower right hand corner where the smoke came from. There should only be one, and it should have a screw in it. I really hope you are not mixing cables between the psus, you should only be using the correct ones each time you've swapped. Antec psu = Antec cables, crappy psu, crappy cables.
  4. I'm with karadjgne, i think you either missed a standoff point and it shorted out the board, or the PSU is just garbage.
    I definitely suggest disconnecting everything from the computer, except for the essentials(motherboard,processor,ram, and speaker for beep codes.) Run the on-board video if you can, that way if something traumatic really takes place you wont short out the 970 also. Disconnect the SSD, DVD, and anything else you got. You don't really have to have any case fans running so disconnnect those too. The less connected the less wires you have sending power, and more you can eliminate from the equation of being wrong.
    Also make sure the the 24pin connector is seated properly and the 8 pin connector at the top of the board is connected properly too. I forgot to connect that 8 pin when i built my first one about 5 years ago, and mine showed same symptoms(minus the smoke)
  5. My case came pre-installed with standoffs, and I'll see if I can get a new board from
    Newegg. All the connectors are plugged in right. The crappy psi in non modular so I'm only using those cables, and I don't think it has a safety stop either.
  6. Most cases have holes designed to fit a variety of motherboard sizes, ATX cases can fit mATX, M-itx, ATX, and some will fit SSI-EEC, so if the 1/2 asleep dude on Friday evening put a standoff in the wrong hole, when the board was mounted, it'll be in direct contact with voltage bearing components. A dead short. Pull the mobo out and check. Look for scorch marks or weld spots if a wire was pinched.
  7. Karadjgne said:
    Most cases have holes designed to fit a variety of motherboard sizes, ATX cases can fit mATX, M-itx, ATX, and some will fit SSI-EEC, so if the 1/2 asleep dude on Friday evening put a standoff in the wrong hole, when the board was mounted, it'll be in direct contact with voltage bearing components. A dead short. Pull the mobo out and check. Look for scorch marks or weld spots if a wire was pinched.


    The standoffs came pre-installed in my case and I used all of stand-offs. Ill pull out the board and see if it works.
  8. Yea, try that. Remove everythign and see if it works
  9. OKAY ALL OF YOU, IT BOOTS just fine out of its case, so it mustve been a short somewhere. How can I make sure its not being shorted out??
  10. Make sure all the standoffs are installed is one way
  11. standoffs are pre-installed
  12. Can you take a picture of the case only?
  13. Bossyfins said:
    Can you take a picture of the case only?


  14. Okay so I put everything back into the case and the same thing happened again! Idk whats going on. Could it be the screws im using to install the board? I just grabbed them out of the packaging and screwed them in. Im getting really frustrated at this. I was very careful installing all of the parts.
  15. Check the back of the mobo, are any of the solder joints excessively long? Are there any scratches in paint on the case behind the mobo, maybe where the backing might be pushed in?

    Could try taking some card stock, cutting it to size and using that behind the mobo. Check for serious impressions of the solder. Could also install without the i/o shield, you may have a bad component somewhere, using the i/o shield to ground out since you boot out of case.
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