Duet Maestro board unresponsive.
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Hello -
Not sure what I have done here. But my board seems "dead" I've disconnected every cable from the printer, an M3D Promega, and removed the board from its' mounting.When connecting to USB, I get 3 red LEDs lit but the PC doesn't see the board (my tablet does see it as "Generic Billboard device) but I cannot seem to get it to register as a serial port (tried Windows and Mac)
Any thoughts on what to try? or is it just toasted?
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Does the green LED indicating the presence of 3.3V power light up?
See https://duet3d.dozuki.com/Wiki/What_to_do_if_your_Duet_won't_respond.
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No... not when connected to USB only.
Nothing is connected to it
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It sounds that your Duet has developed a fault on the 3.3V supply rail. As it is in a Promega, best talk to M3D.
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@dc42 Thanks - support ticket opened.
There is a small spot on the U2 regulator... I wonder if it grounded and popped the reg? I have done nothing to the printer other than change nozzles... but If I read the wiring correctly, that might have been enough to short something to ground.
Thanks
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U2 is the 3.3V regulator. It normally survives having its output shorted to ground.
