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Cable adapter damaged PC


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3 replies to this topic

#1 Johnymoff

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Posted 28 December 2016 - 12:15 PM

Hardware

  • The PSU is a Corsair 650 watt semi module.
  • We bought a cable adapter to convert one of the psu's  6 pin pci-e outlets on the bac to a 4 pin molex.
  • On the adapter cable: There are 2 yellow wires that connect 2 pins from the pci-e  to 1 pin on the molex, and 2 black wires connecting another 2 pins on the pci-e to another single pin on the molex. Here is the adapter cable: https://www.amazon.com/gp/product/B007NMSUUA/ref=oh_aui_detailpage_o02_s01?ie=UTF8&psc=1

Issue:

  • When the adapter cable is plugged in to the PSU, the PSU won't power on.
  • If i plug in the adapter cable when the PSU is on, the PSU dies.
  • Turning the PSU off and then on again seems to reset the PSU
  • The computer is dead now. Having this cable plugged in and trying to power up the computer, fried the motherboard.

 

Questions:

  • Is it normal behavior for the PSU to do this?
  • Could this have damaged the PSU?`
  • Does it make sense that this fried my motherboard?
  • Could this have fried the CPU?

Thanks,

-John

 

 



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#2 Drillingmachine

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Posted 28 December 2016 - 12:24 PM

Hardware

  • The PSU is a Corsair 650 watt semi module.
  • We bought a cable adapter to convert one of the psu's  6 pin pci-e outlets on the bac to a 4 pin molex.
  • On the adapter cable: There are 2 yellow wires that connect 2 pins from the pci-e  to 1 pin on the molex, and 2 black wires connecting another 2 pins on the pci-e to another single pin on the molex. Here is the adapter cable: https://www.amazon.com/gp/product/B007NMSUUA/ref=oh_aui_detailpage_o02_s01?ie=UTF8&psc=1

That adapter is to turn 4-pin molex into PCI Express 6-pin, NOT other way around.

Issue:

  • When the adapter cable is plugged in to the PSU, the PSU won't power on.
  • If i plug in the adapter cable when the PSU is on, the PSU dies.
  • Turning the PSU off and then on again seems to reset the PSU
  • The computer is dead now. Having this cable plugged in and trying to power up the computer, fried the motherboard.


- In to the PSU? Really?
- When PSU is on, you shouldn't plug any cables
- That's how it should work.
- "Congratulations".
 

Questions:

  • Is it normal behavior for the PSU to do this?
  • Could this have damaged the PSU?`
  • Does it make sense that this fried my motherboard?
  • Could this have fried the CPU?
Thanks,
-John

 
- Yes
- Yes
- Yes
- Possibly

#3 Gorbulan

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Posted 28 December 2016 - 01:40 PM

  • If i plug in the adapter cable when the PSU is on, the PSU dies.

 

This may have caused the motherboard to fry. Also, using the adapter incorrectly may have caused it. You never ever plug in something internally when the computer is on. There are some minor exceptions, but it is a rule that you do not mess with anything internal while power is on.



#4 Johnymoff

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Posted 29 December 2016 - 04:10 AM

Thanks, everyone. After a new mobo and proper cables, we were able to assess the full damage

  1. dead mobo
  2. one of our two memory sticks
  3. graphics card

Definitely a hard lesson but now we know.

 

Regards






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