Possibly fried duet with an in spec power supply
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Right but other shorted issues always reference one of those being out, so I just wanted to clarify. When you say try reinstalling after turning on debugging(which succeeded btw), do you mean M997 S1?
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If that is the case the output was identical, not sure what debugging added to the mix.
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Infrared thermometer reads ~38c on the cpu chip with just USB power.
I'm willing to take the blame, but I really dont see what I did. Is it possible I got a lemon?
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@Luckypriest said in Possibly fried duet with an in spec power supply:
If that is the case the output was identical, not sure what debugging added to the mix.
if nothing then we know the uart from the cpu or the wifi module is damaged as the update should at the very least print the bootloader from the wifi module afaik.
Is it possible I got a lemon?
afaik the boards are automatically tested during production, so while possible, its unlikely - but this is where I take a step to the side and let the Duet people deal with it.
while you wait you might want to look into if you have any consumer protection rights that goes beyond 6 month warranty if the board was purchased september '19
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@Luckypriest Sorry you Duet board has failed. With a burn mark like that on the processor, I'm pretty sure that it's not going to be recoverable, and only a processor swap is going to get it fully working again. Duet3D don't really do repairs such as this, but there are some in the community who may: https://forum.duet3d.com/topic/13875/community-repairs
As to what caused the problem, I'm not sure. If nothing else was plugged in but USB and 12V, and it wasn't a USB ground loop, I'd look for solder bridges or shorts on the board, looking at both sides. Are you sure there was nothing under the board that could have shorted against the pins? Post a good, well-lit, high resolution picture of both sides of the board. It's better to take picture from further away, and zoom in on the board, rather than take a picture too close and have some parts out of focus, even if this is slightly lower resolution.
Unfortunately, if you bought the board in September 2017, it's well outside the warranty period, and even 2-year consumer protection (if that even applies). It is the older version of the board (v1.02) without fuse protection, too.
However, if you contact sales@duet3d.com, we have a small stock of refurbished Duets that may reduce the cost of replacement.
Ian
Cartesian bed-slinger with Duet 3 Mini 5+ WiFi and 1LC : RRP Fisher Delta v1 with Duet 2 Maestro : TronXY X5S with Duet 3 MB6HC and Roto toolboard
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it was sitting on my 100% polycarbonate(?) plastic of some sort build plate that I was waiting to try, thats why I'm so dumbfounded. I didnt see anything like bad solder joints on the underside myself, let me get some better pictures.
@bearer Thanks for all your help, seriously.
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holy f***' 2017?! well that explains the 1.02 board ... I'm not sure if my brain autocarroted it to 2019 or if I should blame the drugs:P (stay away from fully charged electric scooters like M365 and long down hills, them brakes stop working:/)
We've seen a few cases of boards being replaced slightly outside the warranty when Duet feel confident the hardware failed through no fault of the user, but 2017.. (incidentally it would still be covered by consumer protection rights here, until 2022(!), but the local price is also a lot higher to account for this, but I digress and thats probably not gonna help OP)
Still can't see anything that looks like a culprit unfortunately.
Baffled by the CPU that looks burned and seems to be working with the exception of the Wifi. Does the Wifi module get hot? And does the CPU also stay at ~38C if powered through Vin?
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@bearer yeah we had a real bad financial 2 years where all projects sat in one very protected corner of the house locked away from the cats. Initially I fat fingered 2019 in there.
I dont have the balls to power it through the vin again... If I do I'm going to use another power supply but I really shouldnt NEED to as its within spec and working per multimeter.
I'm in the US, they dont love the people here like they do in the EU (assuming thats where the protection rights are in!). I'm also not going to go after a good company like duet for something minor like this but IDK, I'd like to maybe send it to them and if they can show me where I screwed up I'm out haha. But in all seriousness were those pictures finally clear enough to look at everything?
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Its not about going after a company when it comes to consume protection - its about providing vendors an incentive to not sell c***, and the vendors do mark up their goods to account for a percentage of claims where products fail within normal use. I just had a Raspberry Pi 3B+ from early 2018 replaced f.ex.
Anyways, back on track; pictures aren't super great. Needs more ambient light and less flash to improve I think. But unless there are parts where the PCB is darker due to heat damage that we don't see on the dark photos I don't think there is much to gain by more pictures.
The esp8266 module might be worth trying to replace, if you have or know someone with some hot air tools, or have access to a maker space or something then its a doable repair to swap it and not too costly either ... but honestly I'd be surprised if there aren't other issues with the main processor as well.
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So @bearer and @droftarts whats the consensus? Think I should hook it up to another PSU and see if more magic smoke comes up?
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I'd use a current limited supply to avoid damage, but thats because I have one.
Then again I'm inclined to think whatever is the culprit is already damaged, so its possible you'll let some smoke out, but odds are that part is already living on borrowed time.
(Ref the community repair thread, the guy in the US only recently passed, and I fear he left an unexpected void on so many levels; rest his soul)
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@bearer OH NO, so when they said sadly no longer with us, he didnt mean assisting... he meant... That is sad.
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Was that unclear? I'm open to changing the wording, tried keeping it short for some reason.
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@Luckypriest said in Possibly fried duet with an in spec power supply:
So @bearer and @droftarts whats the consensus? Think I should hook it up to another PSU and see if more magic smoke comes up?
I'd say you have nothing to lose. I remember seeing a lot of Duet 0.6 boards with burnt processors like that, usually from shorting VIN directly through the processor, usually on thermistor inputs or endstops. But the Duet 2 has a lot more protection on it against that.
Try hooking up VIN without USB connected and SD card removed, see what power LEDs come on (on the edge by the reset/erase buttons). With luck, it will show that either the 5V or 3V regulator has died. The board may not power up, but it might mean you can look for other places that may be shorting.
Ian
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@bearer its not that its unclear, but when it comes to a project like assisting people with fixing electronics I just didnt think departed. Just thought he helped x amount of time and is no longer helping.
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@droftarts said in Possibly fried duet with an in spec power supply:
However, if you contact sales@duet3d.com, we have a small stock of refurbished Duets that may reduce the cost of replacement.
Given the damage to the CPU who knows what else could be gone or about to go, so this may be your best option over repair.
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@Luckypriest said in Community repairs?:
@Luckypriest Or at least give me recommendations / links for the parts and a friend of mine and I might try to wing it for fun.
While its more likely the cpu needs replacing than the wifi, i'd start with the wifi because its cheaper and easier. Its off to one side of the board and no huge ground planes, 2mm pitch instead of 0.5 or 0.4.
ESP12F module (or ESP07S if you want external antenna)
You'll find schematics and design files with partnumbers here if you want to try your hand at the CPU
https://github.com/T3P3/Duet/tree/master/Duet2/Old versions/DuetWifiv1.02 -
@Luckypriest or remove the ESP and test it with an Arduino?
Ian
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@droftarts said in Possibly fried duet with an in spec power supply:
@Luckypriest or remove the ESP and test it with an Arduino?
Ian
oh yes! or an ftdi 3.3v usb ttl adapter could also be used, (maybe evnen prior to removal to see if the uart on the esp is ok - but depending on the fault it might work outside the circuit even if it doesn't work in the circuit)
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Thanks guys, this is a lot for me to process. I'm going to try giving the wifi replacement a shot, and if that doesnt work might play around with CPU replacement, if only to see if I can. This is a lot for me to process, fairly new to actually messing with circuit boards.
