SD Card Smoked and Burned
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Hello All
I was setting up my new Duet 2 WIFI. I had been having issues with my end stops not working so i decided to go with stall detection. Everything seemed to be working fine i removed my end stop wires from the board and continued testing. when suddenly i started smelling smoke. I turned off the machine and found that the SD card was very hot (burned me a little when i ejected it) the SD card has clear heat damaged and looks like it started to burn. Now the board is not responsive. I unplugged everything (except the heated bed and hotend because they dont unplug) and tried to turn the system back on. after a few min i noticed a burning smell, my hot end was on full blast. Im not sure whats wrong any ideas? it will not connect to USB and when i plug in the SD card when it is on usb power it starts smoking again.
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Sounds like a short to 3.3v.
Please follow https://duet3d.dozuki.com/Wiki/What_to_do_if_your_Duet_won't_respond
and share the status from each step. Take some pictures before disconnecting stuff as well, may come in handy later to try and prevent it from happening again.
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It sounds like your microSD card was excessively bent - in fact I had a similar problem with a damaged microSD card a while back. It became too hot to touch so I had to replace it. Does the board still turn on with the microSD card removed? Before you check that, please verify that there is no visible damage on the board.
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I already unplugged everything. when i plug in USB all of the lights seem to come on.
I do not see any burned chips or anything like that 
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Maybe try firmware recovery but its a long shot.
If anything on the board feels hot when running of USB then stop.
Btw, just lighting or a hole?
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@bearer said in SD Card Smoked and Burned:
Maybe try firmware recovery but its a long shot.
If anything on the board feels hot when running of USB then stop.
Btw, just lighting or a hole?
Ah yeah good catch i did not see that! Looks like a hole to me.
I have tried 2 usb cables 2 computers and no dice on connectivity.
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@skywurz said in SD Card Smoked and Burned:
I have tried 2 usb cables 2 computers and no dice on connectivity.
yeah, long shot. with a hole in U10 you woulnd't be able to run motors no matter what happened; odds are you'll need a couple of chips replaced.
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@bearer said in SD Card Smoked and Burned:
@skywurz said in SD Card Smoked and Burned:
I have tried 2 usb cables 2 computers and no dice on connectivity.
yeah, long shot. with a hole in U10 you woulnd't be able to run motors no matter what happened; odds are you'll need a couple of chips replaced.
Yeah trying the instructions when i jumper the erase pin i do not get the diag light and then the board starts smelling hot. the large chip becomes hot to the touch.
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For posterity here is the SD card
And a screen shot of my voltage from the web console
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Just wanted to post an update. i have re-installed my old controller (Rambo) and swapped back all of my electronics and nothing seems a miss. I want to point out i had not changed any 5v connectors during the swap to or from the duet and i did not install or move any 24v connectors (bed,hotend) while the system was powered on.
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Hi @skywurz, I'm sorry your board has failed. We'll give you the benefit of the doubt and provide a replacement under warranty. Please contact your supplier. If you bought it direct from Duet3D, https://www.duet3d.com/warranty.
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@dc42 Thank You!!!
