I know that there's already post about this, but mine is different. Instead of not recognized, it gets recognized, and I can upload codes, but after a while, windows starts to not recognize it. And there is a temporary fix for this for my laptop, I need to restart. And even after restarting, it still becomes not recognized after a while

Edit : forgot to mention, even if it is not recognized, it still sends power to the arduino

  • Genuine Arduino board, or a cheap Chinese knock-off?
    – Majenko
    Apr 15, 2018 at 11:57
  • I am pretty sure it is a genuine arduino board. Also, this just happened recently, I had this board for over 5 months now, and this just happened
    – Flaze07
    Apr 15, 2018 at 12:07
  • It sounds like the USB chip is dying. I would expect that from a Chinese clone, but not a genuine Arduino.
    – Majenko
    Apr 15, 2018 at 12:52
  • Does the USB chip get hot?
    – Majenko
    Apr 15, 2018 at 12:52
  • The USB Chip does not get hot
    – Flaze07
    Apr 15, 2018 at 14:27

1 Answer 1


The USB microcontroller Atmega16U2/Atmega8U2 on the Ardunio UNO board might be corrupted. Try uploading the USB to Serial HEX file with boot-loader found in C:\ProgramFiles\WindowsApps\ArduinoLLC.ArduinoIDE_1.8.10.0_x86__mdqgnx93n4wtt\hardware\arduino\avr\firmwares\atmegaxxu2\Arduino-COMBINED-dfu-usbserial-atmega16u2-Uno-Rev3.hex using Flip OR any other other ardunio (as an ISP programmer). for doing this you have to first enter BOOT-LOADER by shorting the Reset Pin of the USB controller to GND both pins can be found on ICSP2 of the UNO. This will surely solve the issue. But, if the problem still persists then your USB controller is damaged and have to replace the controller and again upload the USB to serial firmware, the process is same as mentioned above, but you don't need to short reset and GND as you don't have an boot loader installed in the new controller.

  • 1
    I can confirm that this cannot be the case. As I have two arduino boards lying around and both of them has the same problem. I don't think both of them could get damaged at the same time. But I might try this option
    – Flaze07
    Apr 16, 2018 at 13:20

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