# Arudino doesn't work after disconnecting the USB from the pc even with the code uploaded and the PSU connected

**URL:** <https://forum.arduino.cc/t/arudino-doesnt-work-after-disconnecting-the-usb-from-the-pc-even-with-the-code-uploaded-and-the-psu-connected/1128306>\
**Category:** General Guidance\
**Created:** [May 18, 2023, 9:01am UTC](https://forum.arduino.cc/t/arudino-doesnt-work-after-disconnecting-the-usb-from-the-pc-even-with-the-code-uploaded-and-the-psu-connected/1128306 "2023-05-18T09:01:23Z")\
**Posts on this page:** 5\
**Page:** 2

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**Author:** ![UKHeliBob](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/ukhelibob/32/215663_2.png) [@UKHeliBob](https://forum.arduino.cc/u/UKHeliBob)\
**Post date:** [May 18, 2023, 10:23am UTC](https://forum.arduino.cc/t/arudino-doesnt-work-after-disconnecting-the-usb-from-the-pc-even-with-the-code-uploaded-and-the-psu-connected/1128306/21 "2023-05-18T10:23:15Z")

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Solder the pins to the Nano and report back what happens when you try the sketch and the circuit

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**Author:** ![CristyRO9](https://avatars.discourse-cdn.com/v4/letter/c/47e85d/32.png) [@CristyRO9](https://forum.arduino.cc/u/CristyRO9)\
**Post date:** [May 18, 2023, 10:25am UTC](https://forum.arduino.cc/t/arudino-doesnt-work-after-disconnecting-the-usb-from-the-pc-even-with-the-code-uploaded-and-the-psu-connected/1128306/22 "2023-05-18T10:25:50Z")

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Currently I have only one board that I want to use for learning, in future I will buy another one and then I'll solder that one,thank you for you help!

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**Author:** ![UKHeliBob](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/ukhelibob/32/215663_2.png) [@UKHeliBob](https://forum.arduino.cc/u/UKHeliBob)\
**Post date:** [May 18, 2023, 10:28am UTC](https://forum.arduino.cc/t/arudino-doesnt-work-after-disconnecting-the-usb-from-the-pc-even-with-the-code-uploaded-and-the-psu-connected/1128306/23 "2023-05-18T10:28:01Z")

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Why are you so reluctant to solder the pins ? You simply must do it if you want to make good connections to the board

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**Author:** ![Idahowalker](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/idahowalker/32/238858_2.png) [@Idahowalker](https://forum.arduino.cc/u/Idahowalker)\
**Post date:** [May 18, 2023, 10:44am UTC](https://forum.arduino.cc/t/arudino-doesnt-work-after-disconnecting-the-usb-from-the-pc-even-with-the-code-uploaded-and-the-psu-connected/1128306/24 "2023-05-18T10:44:09Z")

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After soldering the pins onto the MCU,

Problem, bread board power rail split:

 ![](https://europe1.discourse-cdn.com/arduino/original/4X/c/e/5/ce5dd6f9f41be606ed83589a8d6ffc73e811c7db.png)  
Solution, bread board power rail split:

 ![](https://europe1.discourse-cdn.com/arduino/original/4X/f/0/3/f03efd3d49c46c86bfb6228fe421e01c3911bc2d.jpeg)

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**Author:** ![system](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/system/32/1140315_2.png) [@system](https://forum.arduino.cc/u/system)\
**Post date:** [November 14, 2023, 10:44am UTC](https://forum.arduino.cc/t/arudino-doesnt-work-after-disconnecting-the-usb-from-the-pc-even-with-the-code-uploaded-and-the-psu-connected/1128306/25 "2023-11-14T10:44:13Z")

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Closed on November 14, 2023, 10:44am UTC

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