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    Duet wifi not booting after short

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    • iamcheeseundefined
      iamcheese
      last edited by

      so something bad happened and there was a short and i burned a hole thru the top of U2, ive since replaced U2 and still cant get anything, i just have a couple leds on and then it seems like all of the other leds on the board are very dimly lit, just noticed that if i plug in usb the metal cage on the micro sd card gets very hot and the can on the wifi module starts to get rather hot too, i have a bad feeling that the board is dead, anything else i can look at that might be borked?

      EDIT: if i remove the sd card the dimly lit leds go off and the 3.3v led gets brighter

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      • dc42undefined
        dc42 administrators
        last edited by

        I'm sorry to hear of your misfortune. How did the short happen? It sounds like it was between a 12V or 24V connection and either +3.3V or +5V. In the rare cases when this happens, the excessive voltage on the +3.3V rail causes multiple components to fail, sometimes including the SD card as appears to have happened in your case. Sadly the board is usually beyond economic repair when this happens.

        Duet WiFi hardware designer and firmware engineer
        Please do not ask me for Duet support via PM or email, use the forum
        http://www.escher3d.com, https://miscsolutions.wordpress.com

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        • iamcheeseundefined
          iamcheese
          last edited by

          Pretty sure it was a wiring mistake on my part, but that is what I feared, will get another board and be more careful with it this time, thank you for the reaponce

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