I have an Arduino Nano and when I power it either via USB or VIN it heats up very quickly. Before it started to overheat I heard a spark but didn't see which pin sparked and I think that's the problem. During the spark I had a L293N motor drivers one IN pin was connected to the board. I tried uploading the blink sketch and disconnecting everything but still having the same problem. I can't see any visual issues on the board. How may I fix it?

  • \$\begingroup\$ Does blinky run properly? \$\endgroup\$
    – Tagli
    Apr 9, 2021 at 18:49
  • \$\begingroup\$ Yes, everything runs normally but it just overheats. \$\endgroup\$ Apr 9, 2021 at 18:50
  • \$\begingroup\$ At 15-20 currency units, a repair could cost more than replacement, especially if you don't already have SMD placement/cooking tools. Even if parts cost didn't go over, time cost would very quickly. Have you checked input voltage and current when it's overheating? \$\endgroup\$
    – K H
    Apr 9, 2021 at 21:51

1 Answer 1


If no loads are active and power recycled for unlatch-up effects, fails to resume normal power dissipation, then it’s SNAFU’d by overvoltage.

  • \$\begingroup\$ Is there anything I can do? \$\endgroup\$ Apr 9, 2021 at 18:51
  • 1
    \$\begingroup\$ @EnesDoğan Your best bet would be to trash this nano and get a new one. These are pretty cheap \$\endgroup\$
    – Eugene Sh.
    Apr 9, 2021 at 18:58
  • \$\begingroup\$ I told you how to recycle power , how to prevent these “cat a strophic” failures needs more data to analyze \$\endgroup\$ Apr 9, 2021 at 19:21

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