@dc42 According to this
https://github.com/T3P3/Duet/blob/master/Duet2/Duet2v1.04/DuetWifi_Schematic_v1.04.pdf
its : AP7361c-33E-13
https://www.mouser.com/ProductDetail/Diodes-Incorporated/AP7361C-33E-13?qs=%2Fha2pyFadugKLjPGv%252b5YwrOyXTiNyKrfVmndilGmr48wnNJYzX5UPw%3D%3D
is that correct?
Received the part this afternoon and just now soldered it, had to use the heat gun to remove the burned regulator, and tested it with a windows laptop with only USB powering the board, I heard the familiar tone that windows make when you connect a device and saw the wifi and the 3.3V led turned on, also checked the browser and it connected and showed the web GUI fine.
Now I am connecting everything back together to print an XYZ calibration cube before I celebrate. thank you, Tony and dc42 for all your help.
Calibration cube printed fine but working without a z-probe for now as I don't know what happened to the Bl-touch and don't want to take any chances if it has a short.
Back to printing. thank you again.
Calibration cube printed fine but working without a z-probe for now as I don't know what happened to the Bl-touch and don't want to take any chances if it has a short.
Back to printing. thank you again.
Received the part this afternoon and just now soldered it, had to use the heat gun to remove the burned regulator, and tested it with a windows laptop with only USB powering the board, I heard the familiar tone that windows make when you connect a device and saw the wifi and the 3.3V led turned on, also checked the browser and it connected and showed the web GUI fine.
Now I am connecting everything back together to print an XYZ calibration cube before I celebrate. thank you, Tony and dc42 for all your help.
@dc42 According to this
https://github.com/T3P3/Duet/blob/master/Duet2/Duet2v1.04/DuetWifi_Schematic_v1.04.pdf
its : AP7361c-33E-13
https://www.mouser.com/ProductDetail/Diodes-Incorporated/AP7361C-33E-13?qs=%2Fha2pyFadugKLjPGv%252b5YwrOyXTiNyKrfVmndilGmr48wnNJYzX5UPw%3D%3D
is that correct?
Update: Found and ordered TC2117-3.3VDBTR
from mouser.com
@t3p3tony Excellent, I used the multimeter to measure Vin to GND and it read 4.69V while the board was powered only by USB and measured Vout to GND and it had a very small fluctuating value like 4 to 1 mv so i will order a new TC2117 hopefully will find a supplier who doesn't require a minimum order of a 1000 units. fingers crossed that this is the only damaged part. will report back.
Thank you so much for your help I can only imaging how busy you are.
@t3p3tony I have no clue what i am looking for but have to ask : is it this ? : 
@t3p3tony I have few buck converters i can use one of them to dial down DC power to 3.3V with the help of a multimeter but where would i connect that on the board afterword? looking at the wiring diagram i can se an optional EXT 5V next to the Power in but cant locate an 3.3V in.
For the 3.3v regulator if i know the the location of the component i may be able to replace it , i have a decent soldering iron with fine tips and a heat gun.
@ms232 maybe a ground loop killed the USB port on the board as explained here https://duet3d.dozuki.com/Wiki/USB_ground_loops
My question now is if it's only the USB port that is damaged or more components and if it's viable to repair?
Found a post with a fairly similar issue https://forum.duet3d.com/topic/5864/usb-connection-failed
I am just wondering now if the problem can be reproduced by plugging in a (PC connected) micro USB while the board is on and powered from a power supply?
@t3p3tony 2 red LEDs one between the USB and the reset button and the other is 5V+
