Something shorted on PC

Ok so I'm helping my church build an editing pc. They decided to just upgrade one of their current pc's. I was cleaning the pc and when plugging everything back in I didnt realize that I plugged in the floppy disc connector into a sys fan header on the motherboard(older psu). Long story short, something shorted and smoke came out of the back side of the pc. I quickly disconnected that floppy disk wire and powered on the pc. The pc powers on fine but I am not getting any output to my monitors. I tried to put in another graphics card that we had laying around and still no output to monitors. Another problem I noticed was that I cant power off the system by holding down the power button, seems the pc isnt reading any button pressing I'm not sure. I'm thinking the motherboard is bad? Please someone help before I unnecessarily order another motherboard! Thanks!!
6 answers Last reply
More about shorted
  1. jaaebizz said:
    Ok so I'm helping my church build an editing pc. They decided to just upgrade one of their current pc's. I was cleaning the pc and when plugging everything back in I didnt realize that I plugged in the floppy disc connector into a sys fan header on the motherboard(older psu). Long story short, something shorted and smoke came out of the back side of the pc. I quickly disconnected that floppy disk wire and powered on the pc. The pc powers on fine but I am not getting any output to my monitors. I tried to put in another graphics card that we had laying around and still no output to monitors. Another problem I noticed was that I cant power off the system by holding down the power button, seems the pc isnt reading any button pressing I'm not sure. I'm thinking the motherboard is bad? Please someone help before I unnecessarily order another motherboard! Thanks!!


    I thought of the motherboard too. Only way you could definitively prove it's bad is to use the board in another rig. Sorry to hear about your lesson. Been there.....
  2. At the very least you've shorted several things together. I'd check the power supply with a tester. When you say back of the PC do you mean the back of the motherboard or back of the case where the IO are at. If smoke was coming from the latter than you may have damaged the power supply.

    fan connector:
    http://www.overclockers.com/forums/attachment.php?attachmentid=92908&d=1300219923

    Floppy power connector:
    http://ueu.co/wp-content/uploads/2014/09/19fig31r.jpg
  3. grimfox said:
    At the very least you've shorted several things together. I'd check the power supply with a tester. When you say back of the PC do you mean the back of the motherboard or back of the case where the IO are at. If smoke was coming from the latter than you may have damaged the power supply.

    fan connector:
    http://www.overclockers.com/forums/attachment.php?attachmentid=92908&d=1300219923

    Floppy power connector:
    http://ueu.co/wp-content/uploads/2014/09/19fig31r.jpg



    Thanks for the quick response! I will try checking the power supply, but the fan and led of the power supply are on and all the leds and fans in the case are on when I power on the system. Is is still possible the psu is bad even though these things are recieving power?
  4. jaaebizz said:

    grimfox said:
    At the very least you've shorted several things together. I'd check the power supply with a tester. When you say back of the PC do you mean the back of the motherboard or back of the case where the IO are at. If smoke was coming from the latter than you may have damaged the power supply.

    fan connector:
    http://www.overclockers.com/forums/attachment.php?attachmentid=92908&d=1300219923

    Floppy power connector:
    http://ueu.co/wp-content/uploads/2014/09/19fig31r.jpg



    Thanks for the quick response! I will try checking the power supply, but the fan and led of the power supply are on and all the leds and fans in the case are on when I power on the system. Is is still possible the psu is bad even though these things are recieving power?


    Yes. It may power fans but a full system load is quite different.
  5. Try to reset the CMOS.
  6. aquielisunari said:
    jaaebizz said:

    grimfox said:
    At the very least you've shorted several things together. I'd check the power supply with a tester. When you say back of the PC do you mean the back of the motherboard or back of the case where the IO are at. If smoke was coming from the latter than you may have damaged the power supply.

    fan connector:
    http://www.overclockers.com/forums/attachment.php?attachmentid=92908&d=1300219923

    Floppy power connector:
    http://ueu.co/wp-content/uploads/2014/09/19fig31r.jpg



    Thanks for the quick response! I will try checking the power supply, but the fan and led of the power supply are on and all the leds and fans in the case are on when I power on the system. Is is still possible the psu is bad even though these things are recieving power?


    Yes. It may power fans but a full system load is quite different.


    Ok so I tried another psu that we had in another functioning computer and still no output to monitors. Also reset the CMOS like another user said to do and still same issue. I think it is safe to say the mobo is no good?
Ask a new question

Read More

Short Circuit Motherboards