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    Potentially dead duet?

    Duet Hardware and wiring
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    • EdChamberlain
      EdChamberlain last edited by

      Hi all, having some trouble with the duet Ethernet today.

      I can't access the web portal and following these instructions here: https://duet3d.dozuki.com/Wiki/What_to_do_if_your_Duet_won't_respond

      the blue 3.3V LED does not light (even with nothing plugged into the board).

      Is this faulty? 😞

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      • dc42
        dc42 administrators last edited by

        The 3.3V LED is green. The blue one is the VIN LED. Which LEDs are working?

        EdChamberlain 1 Reply Last reply Reply Quote 0
        • EdChamberlain
          EdChamberlain last edited by

          I'm getting a Vin LED and a 5V LED with nothing plugged in. With the hotend plugged in (and the board powered from the psu) I'm getting the same but with a heat light.

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          • EdChamberlain
            EdChamberlain @dc42 last edited by

            @dc42 Still no luck today - I cant think of anything that could have damaged the board though, cant find any shorts either.

            dc42 1 Reply Last reply Reply Quote 0
            • dc42
              dc42 administrators @EdChamberlain last edited by dc42

              @edchamberlain, are any of the ICs on the Duet getting hot (in particular U2), or the WiFi module? Does U2 look damaged?

              What type of Z probe are you using, and how is it wired?

              EdChamberlain 1 Reply Last reply Reply Quote 0
              • EdChamberlain
                EdChamberlain @dc42 last edited by

                @dc42 Nothing noticeably warm to the touch (this is an Ethernet model so no wifi module - no activity lights on the Ethernet module port or on my network switch for the port - have tried different cables and different ports).

                Z probe is currently unplugged - was using a servo with a IR gate.

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                • dc42
                  dc42 administrators last edited by

                  If the 3.3V LED is not lit, then unless the LED has failed the 3.3V supply is missing. You could confirm this with a multimeter, if you have one.

                  In similar cases I have investigated, U2 and U11 were getting hot, and the pattern of blown chips indicated that the +5V rail or the +3.3V rail had been shorted to a fan or heater connection.

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