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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?

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  • CH340 USB chip on it? – Majenko Jan 27 '20 at 22:39
  • @Majenko Atmega16U2 – Francisco Hanna Jan 27 '20 at 22:43
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    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 '20 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/… – static_cast Jan 29 '20 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 :( – Francisco Hanna Jan 30 '20 at 19:42
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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.

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  • It's already at the most recent version. – Francisco Hanna Jan 30 '20 at 16:45

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