@Phaedrux Yes I did and it was still unresponsive.
I purchased it from Amazon back in december of 2022

@Phaedrux Hello, I want to thank you for all the help so far. However, I cannot connect to YAT and the board seems unresponsive even though the QLEDs are on. Does this qualify for a warranty exception? My lab needs a clay printer running before august and nothing has worked on the forum you linked.

@Phaedrux got to plugging in the board via USB. The port is shown on my PC but it is named "USB Serial Device (COM3)" and that is not one of the names listed on the forum you linked me to. What next? Thank you!

@dc42 hello, thank you for the reply. I have checked both of the fuses and they are fine, along with the power supply. There are no burned components on the board either. I am not sure where to go from here. Is the board under warranty and covered for situations like this or should we purchase a new board? Thank you.

Hello,

As the title states, I hit start on a print to test extrusion and right after heard a pop, followed by a smoke smell. Duet Board is stated as 'off' on the web control; heres the weird part, there are no blown fuses, burnt solders, or even a sign of the duet being damaged. The QLEDs on the board are flashing as if everything is fine (blinking red, with other lights constantly on) but I cant get a response out of it through web control. I checked the Raspberri Pi as well and everything

My question is do I need a new duet board or is there a fix for this problem? If i do need a new board, is it covered under warranty? it was purchased recently.
Setup info:
DUET 3 Mainboard 6HC
Raspberri Pi 4 used as SBC to control
2 Z motors
2 Y motors
1 X motor
Printer is being built as a clay printer.