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I think my power supply is dead. How can I check?

Discussion in 'Xbox 360 - Modding & Hacking' started by CentiZen, Oct 4, 2013.

  1. CentiZen

    CentiZen Newbie

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    Hi there everyone, I'm trying to fix my XBox 360 Slim which is throwing a red ring the moment I turn it on. Secondary debug code is 0002, which usually indicates an issue with the power components. From a visual inspection I cannot see any bulging, or any outward signs of damage to the components. Reflowing the solder is going to be my last resort.

    However, I think it might be that the power supply is to blame, unless it works in a really weird way by default. It is supposed to output two different voltages, 5v and 12v on either one of the two barrel jacks on the connector. I'm testing the connector by putting my positive lead (of my multimeter) on the middle pin and the ground lead on the metal jacket.

    When I test the barrel plug on the right, I get 5.15v, which checks out. But when I test the left barrel plug, I get nothing. Am I right in thinking that it should be putting out 12v on that plug while it is plugged in? Or does the power supply not output at 12v unless there is a specific load on the 5v line? Otherwise I'm pretty sure this is why it isn't working.

    I know this isn't directly involved in Xbox modding, but this is easily the most knowledgeable and active place on the internet when it comes to the Xbox. Thanks!

    Micahel
     
  2. richietea

    richietea Regular member

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    Difficult to pin down other than a process of elimination.Firstly if you have a friend with a slim check your psu with that console.If it works then its the slim.Secondly check to see if there is any metal or obstruction that is shorting the board out.Next look at the mosfet's on the board,clean with a little alcohol and dry.Test with a multimeter (link below).

    http://www.360-hq.com/xbox-tutorials-176.html
     
  3. Eisherz

    Eisherz Active member

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    Before you do that, remove the harddrive and see how it reacts, I had the same reactions from a dead harddrive.
     
  4. TheMadModderUK

    TheMadModderUK Newbie

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    On the small side of the AC Adaptor if when you turn on you Xbox 360 it should turn green. But, if it is red your AC Adaptor is fucked...
     
  5. CentiZen

    CentiZen Newbie

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    The hard drive is out, in fact there was never a hard drive in it from the start.

    I tested my friends PSU and it has the exact same measurements, so I imagine microsoft designed the power supply to switch on the 12 volt rail when a certain amount of current is drawn from the 5 volt rail. Weird design but it might help in longevity.

    Thanks a lot for that link, rich. I'll be delving into that right now.
     

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