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PLED causes immidiate pc shutdown

Hi,

I just installed a new cpu (upgrade) and new cooler. To properly install the cooler I had to take the mobo completely out of the case.

After rebuilding the pc however, it booted up for a second and then died.

Sooo I started removing components again and after a lot of testing it became clear that the culprit was the PLED (pwr led). When I connect these pins to the case the pc lights up/runs for a second and then dies. When I leave it disconnected it boots and runs normally.

Before doing this today I had no problems, same case, same mobo.

What do you guys think could be the problem? Is it possible to destroy this even though being really careful with the mobo? Or could this be in any way, somehow, related to my new cpu?

Thanks for your thoughts!
Reply to Tissa_
3 answers Last reply Best Answer
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  1. Best answer
    Hello,
    The PLED is simply an indicator that power is flowing in your system. The CPU is not responsible for this action. If the physical cable and connector being attached to your motherboard kills the POST cycle then it's fair to say that the wire or connector has fried. The main culprit would be the electrical short caused by the bad connector (or wire) which prompts your PSU to stop sending power (This is a good thing. It means your PSU is doing it's job and detecting shorts).

    If your case can, I would replace the PLED cord and light. And if I had to guess, I would say that you somehow caused some ESD on that section of your motherboard and killed the connection.
    Reply to Jwpanz
  2. Have you tried reversing the connector?
    Reply to GhislainG
  3. GhislainG said:
    Have you tried reversing the connector?


    Yess I did.

    Anonymous said:
    Hello,
    The PLED is simply an indicator that power is flowing in your system. The CPU is not responsible for this action. If the physical cable and connector being attached to your motherboard kills the POST cycle then it's fair to say that the wire or connector has fried. The main culprit would be the electrical short caused by the bad connector (or wire) which prompts your PSU to stop sending power (This is a good thing. It means your PSU is doing it's job and detecting shorts).

    If your case can, I would replace the PLED cord and light. And if I had to guess, I would say that you somehow caused some ESD on that section of your motherboard and killed the connection.


    Thanks! I actually thought something like this. After you saying it could be faulty wire as well, not the mobo I tested this with a old case I had laying around and indeed everything worked fine, including the led on that old case. So apparently I destroyed the wires somehow.
    Reply to Tissa_
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