@onerob said in Duet 2 Wifi stopped responding:

Well I think I discovered what happened here. While nothing on the topside of the board was evident, as I unmounted the board and removed it from its case to investigate further, being the neat-freak I am, I routed some wires under the board. What appears happened was when I mounted the board and tightened down the mounting screws, my 24v supply line to my buck converter must have been oriented just right (I'd love to calculate the odds) and got pierced by a solder joint on the board (the Duet 2 Wifi has some long ones). I imagine it didn't initially pierce all the way through but as time went by the vibrations (the board case is mounted on the side of my printer frame) must have caused it to slowly dig until it finally dug deep enough to short out. The vibrations from me mounting my filament spool onto the printer frame in preparation to print must have been what finally did it.

Oh well... Another lesson learned I suppose, albeit a slightly expensive one.

Thank you @elmoret and @jay_s_uk for your responses.

On the bright side, I'm going to use this as an excuse to upgrade to the Duet 3 6HC and finally take it to the next level. I've been wanting to add a laser and a few other things (LEDs, etc.) that the Duet 3 will allow me to do.

Well I think I discovered what happened here. While nothing on the topside of the board was evident, as I unmounted the board and removed it from its case to investigate further, being the neat-freak I am, I routed some wires under the board. What appears happened was when I mounted the board and tightened down the mounting screws, my 24v supply line to my buck converter must have been oriented just right (I'd love to calculate the odds) and got pierced by a solder joint on the board (the Duet 2 Wifi has some long ones). I imagine it didn't initially pierce all the way through but as time went by the vibrations (the board case is mounted on the side of my printer frame) must have caused it to slowly dig until it finally dug deep enough to short out. The vibrations from me mounting my filament spool onto the printer frame in preparation to print must have been what finally did it.

Oh well... Another lesson learned I suppose, albeit a slightly expensive one.

Thank you @elmoret and @jay_s_uk for your responses.

@onerob said in Duet 2 Wifi stopped responding:

Well I think I discovered what happened here. While nothing on the topside of the board was evident, as I unmounted the board and removed it from its case to investigate further, being the neat-freak I am, I routed some wires under the board. What appears happened was when I mounted the board and tightened down the mounting screws, my 24v supply line to my buck converter must have been oriented just right (I'd love to calculate the odds) and got pierced by a solder joint on the board (the Duet 2 Wifi has some long ones). I imagine it didn't initially pierce all the way through but as time went by the vibrations (the board case is mounted on the side of my printer frame) must have caused it to slowly dig until it finally dug deep enough to short out. The vibrations from me mounting my filament spool onto the printer frame in preparation to print must have been what finally did it.

Oh well... Another lesson learned I suppose, albeit a slightly expensive one.

Thank you @elmoret and @jay_s_uk for your responses.

On the bright side, I'm going to use this as an excuse to upgrade to the Duet 3 6HC and finally take it to the next level. I've been wanting to add a laser and a few other things (LEDs, etc.) that the Duet 3 will allow me to do.

Well I think I discovered what happened here. While nothing on the topside of the board was evident, as I unmounted the board and removed it from its case to investigate further, being the neat-freak I am, I routed some wires under the board. What appears happened was when I mounted the board and tightened down the mounting screws, my 24v supply line to my buck converter must have been oriented just right (I'd love to calculate the odds) and got pierced by a solder joint on the board (the Duet 2 Wifi has some long ones). I imagine it didn't initially pierce all the way through but as time went by the vibrations (the board case is mounted on the side of my printer frame) must have caused it to slowly dig until it finally dug deep enough to short out. The vibrations from me mounting my filament spool onto the printer frame in preparation to print must have been what finally did it.

Oh well... Another lesson learned I suppose, albeit a slightly expensive one.

Thank you @elmoret and @jay_s_uk for your responses.

@elmoret Thanks! I'll do that

@onerob Understand, if this is due to something I did wrong, be it loose wiring, lack of providing surge protection (I should know better), etc. I would take full responsibility and own up to the loss (a hundred bucks isn't going to throw me into bankruptcy). I would just like to know what happened. I've really enjoyed working with my Duet over the past several months and I'd love to continue.

@phaedrux 3DMakerWorld, Inc.

@jay_s_uk I purchased it from Amazon on June 22nd of this year. I examined the wiring and it all appears sound. I know looks can be deceiving when it comes to wiring, but I have all wires terminated to Molex KK type connectors and end connectors (VIN, bed & hotend heaters, etc.). When it comes to wiring, I don't cut corners. That being said I know stuff happens but I'm just sick to think my printer's dead right now and I have no explanation as to what went wrong! (I mean, I still have my BTT SKR 2 control board I replaced with the Duet, but I don't want to go back to that!).

@jay_s_uk That's the thing, I don't know where the short would have occurred.. It's not like I was wiring up an external component or something (the last thing I wired up was an accelerometer about a month ago, but that's long since been disconnected after I setup my input shaping). I imagine a power surge could have done it, but as I previously stated the power to the board was turned off (but not disconnected, so I suppose this could have been the cause?). So, what next? Without knowing for sure what happened am I screwed out of a warranty claim?? I certainly hope not I have A LOT of time and knowledge devoted to this.

@jay_s_uk Thank you for your reply. Both PC and power supply are on the same ring so I connecting both and the device still did not show up.

Checking the components, the CPU chip (see attached) gets pretty hot to the touch. Like I can put my finger on it but have to pull it away after 5 secs or so as it becomes too hot to touch. Not sure if this is normal?

Duet 2 Wifi board just stopped responding out of the blue. Diag LED always on, power indicator LEDs appear normal. Unable to connect via USB (no device shows up). Attempted to erase several times, board still not showing up in device list on pc.

I have no idea what just happened... I was preparing for a print, as I've done at least 100 other times. I preheated my bed and hotend via DWC, turn around to load my filament spool and when I turned back around and looked at DWC, it was just spinning saying it was attempting to reconnect. Checked my Wifi LED, it was off, but Diag LED was on.... Odd, so I powered the Duet off, waited for several seconds, powered it back on and same thing. The Power LED's look normal, I believe (VIN blue, 5v red [unsure if that's supposed to be red], 3.3v green). I removed my sd card, attempted to reset but the reset button does nothing. So I powered off and back on without the SD card and everything still the same issue. I then followed the directions in the Duet won't response webpage and I don't even see the Duet show up in the Device Manager, even after multiple erase attempts. Even tried switching USB ports on my pc, as well as USB cables. I'm using a BL Also fyi, I'm using a BL Touch Z endstop so my M558 is P9.

This is very odd, as I've printed at least 100 times with this board without incident and suddenly out of the blue this happens! The only remote possibility I can think of is we had a thunderstorm roll through earlier today, but I had everything shut off so I don't know how that could be the culprit.

Is there anything else I should try aside from everything I already did? I'm out of options here.

Thank you!

@norder Thanks for the info! Yeah I have the CS wire (orange in my case) running by itself (it's paired up with shielding and an unused white wire). Then I have the shielding from that soldered to the cable shielding and both terminated with the GND at BOTH ends. It's working consistently now and I'm just now getting ready to do some input shaping.

If it hadn't been for this forum and everyone who contributed to this topic in one form or another I'd be dead in the water, so a BIG THANK YOU to all of you (of course a special shout out to @dc42 )!!