I have an Arduino UNO (clone, not original) that was working fine until a couple of days ago. Now, it does not show up when I connect it to my laptop.

Things that I've troubleshouted:

  1. USB cable is fine (tried with another Arduino).
  2. USB ports are fine (tried with another Arduino).

  3. Followed all the fixes and checks listed here and everything is successful.

  4. I can upload sketches trough ICSP using a working Arduino.

  5. I've tailed syslog while connecting and disconnecting the failing Arduino and nothing shows up (it does when using the "good one").

  6. I've tried on a Windows 10 machine and it doesn't show up.

What else can I try?

  • CH340 USB chip on it?
    – Majenko
    Jan 27, 2020 at 22:39
  • @Majenko Atmega16U2 Jan 27, 2020 at 22:43
  • 1
    Unusual. Maybe it's not a real one or its a factory reject. Probably dead. Continue using ICSP or use a USB UART dongle with it
    – Majenko
    Jan 27, 2020 at 22:44
  • Wondering if you bricked it similiar to my issue. @Majenko helped me as well :). Link to that answer located here: arduino.stackexchange.com/questions/66239/… Jan 29, 2020 at 14:34
  • @static_cast I see that your problem was solved by reuploading the bootloader. I've already try that and it didn't work :( Jan 30, 2020 at 19:42

1 Answer 1


I can't comment yet but have you updated your board manger for UNO on unbunto?

tools > Board > Board Manger > Search UNO

Kind of dumb to have to do that but it happen to me before and this was the solution I did.

  • It's already at the most recent version. Jan 30, 2020 at 16:45

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