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    Suddenly I have no connection to my board

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    • axiomundefined
      axiom
      last edited by

      Suddenly I have no connection to my board, neither via wifi nor via USB cable. Nothing is recognized via USB cable even if I change the port. The LEDs all light up.

      axiomundefined 1 Reply Last reply Reply Quote 0
      • axiomundefined
        axiom @axiom
        last edited by

        @axiom said in Suddenly I have no connection to my board:

        Suddenly I have no connection to my board (Duet 2 Wifi), neither via wifi nor via USB cable. Nothing is recognized via USB cable even if I change the port. The LEDs all light up.

        dc42undefined 1 Reply Last reply Reply Quote 0
        • dc42undefined
          dc42 administrators @axiom
          last edited by

          @axiom see https://docs.duet3d.com/User_manual/Troubleshooting/Duet_wont_respond

          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

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

            @dc42 I'm following the troubleshooting step by step so I did the following:

            "If the reset button is stuck (rare) or mounted so that it is pushed in by a case, the Duet will get stuck in a boot loop, causing the DIAG LED to stay lit. Check to see if around the reset button, or gently pull the button out with tweezers."

            now only a small piece came out and when I put it back it broke off...but there is more plastic in it and I can't remove it even though I use watchmaking tweezers.
            What can I do now?
            And the Diag LED is still red

            infiniteloopundefined 1 Reply Last reply Reply Quote 0
            • infiniteloopundefined
              infiniteloop @axiom
              last edited by

              @axiom said in Suddenly I have no connection to my board:

              What can I do now?

              Did you remove the SD card?

              axiomundefined 1 Reply Last reply Reply Quote 0
              • axiomundefined
                axiom @infiniteloop
                last edited by

                @infiniteloop yes

                infiniteloopundefined 1 Reply Last reply Reply Quote 0
                • infiniteloopundefined
                  infiniteloop @axiom
                  last edited by

                  @axiom can you post a (good) photo with all LEDs on the left side of the board, including the SD card socket? Please take this when the board is powered so that we can see the LEDs.

                  axiomundefined 1 Reply Last reply Reply Quote 0
                  • axiomundefined
                    axiom @infiniteloop
                    last edited by

                    @infiniteloop
                    Only USB-Connection: IMG_2527.JPEG IMG_2528.JPEG Connected with power supply: IMG_2529.JPEG

                    infiniteloopundefined 2 Replies Last reply Reply Quote 0
                    • infiniteloopundefined
                      infiniteloop @axiom
                      last edited by

                      @axiom Looks like there might be some drop of solder where it doesn't belong. But I'd like to have a second expertise: maybe @T3P3Tony or @dc42?
                      Solder.jpg

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                      • infiniteloopundefined
                        infiniteloop @axiom
                        last edited by

                        @axiom To test the reset button, first remove power from the board. Then, measure resistance between the contacts marked in the photo.

                        Contacts.jpg

                        This is very difficult with the usual measuring probes. Furthermore, the tips may not touch the metal housing of the switch - I recommend putting an adhesive strip on the side facing the contacts.

                        In order to verify the measurement, you need someone who presses the button once during the measurement: only then may the measured resistance be 0. Else, it must be near infinite.

                        Measure carefully and try several times so that you can be sure of the result.

                        axiomundefined 1 Reply Last reply Reply Quote 0
                        • axiomundefined
                          axiom @infiniteloop
                          last edited by

                          @infiniteloop The resistance is 1, I can't measure when the button is pressed because the button broke (see above)

                          infiniteloopundefined 1 Reply Last reply Reply Quote 0
                          • infiniteloopundefined
                            infiniteloop @axiom
                            last edited by infiniteloop

                            @axiom

                            The resistance is 1, I can't measure when the button is pressed because the button broke (see above)

                            Sure I read that, but I didn't know that the button got stuck. Looks like it has to be replaced …

                            EDIT:

                            The resistance is 1

                            What does this mean with your multimeter: "near 0" or "open"?

                            axiomundefined 1 Reply Last reply Reply Quote 0
                            • axiomundefined
                              axiom @infiniteloop
                              last edited by

                              @infiniteloop 0 means open load - idle, 1 means resistance is present but not within the measuring tolerance

                              infiniteloopundefined 1 Reply Last reply Reply Quote 0
                              • infiniteloopundefined
                                infiniteloop @axiom
                                last edited by

                                @axiom

                                0 means open load - idle, 1 means resistance is present but not within the measuring tolerance

                                I already noticed that you own a very interesting multimeter: Usually, 0 Ohm is what you read from a short - or from a pressed button.

                                In other words: if your measurement was properly done and the reading (e.g. "1") is correct, probability is high that your reset button is not stuck in.

                                axiomundefined 2 Replies Last reply Reply Quote 0
                                • axiomundefined
                                  axiom @infiniteloop
                                  last edited by

                                  @infiniteloop No, it can't get stuck because I pulled it out with tweezers as described in troubleshooting, unfortunately I can't put it back in because it broke off. Can the knob or switch be replaced individually? Can I continue to work without the switch for the time being? The question is, is there any hope that the board will get a connection again with this initial situation and why does the Diag LED still light up red. I've tried with and without the SD card, endstops in and out, etc. Any ideas on how to proceed?

                                  infiniteloopundefined 1 Reply Last reply Reply Quote 0
                                  • axiomundefined
                                    axiom @infiniteloop
                                    last edited by

                                    @infiniteloop When troubleshooting, it says that if the LED lights up red, the firmware may have to be reinstalled. i took a new sd card, but maybe the sd card reader is not working? I still can't establish a connection via USB cable, the port is not recognized

                                    infiniteloopundefined 1 Reply Last reply Reply Quote 0
                                    • infiniteloopundefined
                                      infiniteloop @axiom
                                      last edited by

                                      @axiom

                                      Can the knob or switch be replaced individually?

                                      Knob: No. Switch: Yes.

                                      Can I continue to work without the switch for the time being?

                                      Yes. If a reset of the board should be required, you can simply shorten the two contacts I pointed you at with a screwdriver.

                                      The question is, is there any hope that the board will get a connection again with this initial situation and why does the Diag LED still light up red.

                                      Good question. According to the link @dc42 pointed you at, we can assume that the firmware doesn't load.

                                      I've tried with and without the SD card, endstops in and out, etc. Any ideas on how to proceed?

                                      Yes. In a first step, you should ensure that VIN is not connected, i.e. the board should only be powered via USB. Then, proceed with the steps under "Connect to a PC via USB and look for the port".
                                      If you don't see any valid port on your PC, try different USB cables: some of these don't contain signal lines, they just supply power.

                                      If you are still out of luck, continue with the section "If the port still doesn't appear on the PC". But please don't erase the firmware until you are instructed by @phaedrux or the other guys from Duet3D to do so, because I am not sure whether there are less critical options to try first.

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                                      • Phaedruxundefined
                                        Phaedrux Moderator
                                        last edited by

                                        Had something happened to the reset switch to cause damage?
                                        Had it ever been used?

                                        Z-Bot CoreXY Build | Thingiverse Profile

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                                        • Phaedruxundefined
                                          Phaedrux Moderator
                                          last edited by

                                          From DC42:

                                          It's very unlikely that the reset switch went short-circuit and that was the cause of the problem. However, without the reset switch it won't be easy to erase the firmware to allow it to be programmed with Bossa. I suggest he starts by connecting it to a PC over USB and see if the Bossa port appears. If it doesn't, he could carefully short the two pins if the reset switch in the photo together for a few seconds, and see if the port appears.

                                          In the unlikely event that the reset switch is shorted, the Bossa port will appear. Uploading firmware over Bossa will appear to succeed, but if if you run Verify in Bossa, it will fail to verify.

                                          Z-Bot CoreXY Build | Thingiverse Profile

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                                          • infiniteloopundefined
                                            infiniteloop @axiom
                                            last edited by

                                            @axiom OK, you got the Go!

                                            When troubleshooting, it says that if the LED lights up red, the firmware may have to be reinstalled. i took a new sd card, but maybe the sd card reader is not working?

                                            Forget the SD card for a moment. RRF consists of several pieces - in the case of your Duet, we talk about the code which resides in the MCU. This is called "firmware" in a narrow sense, it must be flashed onto the board in order to bring that back to work.

                                            The troubleshooting section "If the port still doesn't appear on the PC" is the first reading, it tells you how to connect with BOSSA over USB. In this context, read what DC42 has to tell you (see @Phaedrux' latest post).

                                            Next reading is "Fallback procedure #2" in the document "Installing and Updating Firmware". Read this carefully before you start, it's crucial to fully understand these instructions. If you are in doubt: ask.

                                            axiomundefined 1 Reply Last reply Reply Quote 0
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