My Duet Maestro is not responding

DukeMachine

So I was recently trying to run autocalibration on my Delta when it just stopped, and the Duet web interface lost connection. I figured maybe my SD card had gotten corrupted or something, so I hooked it up to a computer...didn't show up on any COM ports, so I hooked it up to my mac, didn't show up on any COM ports. Tried a different cable, still no dice. So I proceeded to the instructions found here: https://duet3d.dozuki.com/Wiki/What_to_do_if_your_Duet_won't_respond

The LED's for 3.3V and 5V are lit up correctly, and the DIAG LED is stuck on.

No "Bossa Port" shows up in Windows.

I'm kinda stuck at this point.

droftarts

Try removing the SD card; a corrupt card (or config.g) can cause a boot-loop, which causes the diag light to stay on.

On some Maestro's the reset button can get stuck in, which causes the same problem of a boot loop; use a pair of tweezers to pull it out if it looks stuck in.

If you haven't disconnected all wiring, that's also worth trying, in case there's a short somewhere.

When you were doing the autocalibration, did the hot end hit something metallic on the bed? Is it possible that you shorted bed heater through the hot end thermistor? There is protection for this, but it may still effect the board.

Ian

DukeMachine

So I have tried removing the SD card, and all the wiring is currently disconnected. I haven't explicitly tried to pull out the reset button, though I did try to press it and it seemed to click.

Small chance of the hot end hitting something metallic, bed is glass covered with a buildtak sheet.

droftarts

Okay, probably the next thing to try is to erase the firmware. Sometimes the firmware can get corrupted enough that it fails to start up properly, and only fully erasing the firmware will fix it. Fortunately pretty rare. Follow the guide here: https://duet3d.dozuki.com/Wiki/Installing_and_Updating_Firmware#Section_Fallback_procedure_Num_3

Ian

DukeMachine

I do this just by jumpering the "erase" headers correct? Have done and I was hoping that would get me to a point where I could at least see the Duet on my PC, no dice. Bossa Port is not listed on my PC after erasing the firmware.

droftarts

You've taken the jumper off now? It only needs to be on for one power cycle. Very occasionally you need to do it a couple of times.

Otherwise, it's probably time to start looking for damage, eg any chips that are obviously burned, or is there any chance that something metal touched/shorted the board. Is this a new board? Genuine Duet or clone?

Ian

DukeMachine

Ok, so yes the jumper was off, I just tried it again and its still not showing up on my Windows PC. Board is a genuine Duet Maestro, purchased in August.

There doesn't appear to be any obvious damage to the board.

Phaedrux

Try some different USB cables and USB ports.

DukeMachine

I've tried 6 different USB ports and 4 different cables

DukeMachine

Guess the next step for me here is to straight up replace the micro...anybody know if I can program the duet with a new chip?

dc42

Is your Maestro still within warranty?

DukeMachine

@dc42 It should be, it was purchased July 18, 2019, however from a Canadian distributer

dc42

Are there any Unknown Device instances showing up in Windows Device Manager? This can happen if you don't have a suitable driver installed for the Bossa Port.

If not, then I am happy to authorise a warranty replacement.

DukeMachine

@dc42 No there aren't, I only see "Communications Port (COM1)"

dc42

@DukeMachine said in My Duet Maestro is not responding:

@dc42 No there aren't, I only see "Communications Port (COM1)"

Please ask your distributor for a replacement under warranty, referring them to this post for authorisation.