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  • Ahh I kinda remember something about holding the reset button while uploading might unbrick the Arduino enough to upload it, but I can't remember when to release the button (or if I'm just imagining this)... are you sure you have the right COM port set and all in the IDE? Commented Jul 14, 2014 at 13:57
  • Yes, pretty sure the ports are right, because the programmer board blinks the leds differently when software tries talking to nano. Commented Jul 15, 2014 at 3:55
  • The official instructions don't mention any capacitors (unless you use a bare chip). Could you show a picture of how you wired it? Commented Jul 15, 2014 at 18:05
  • It suggests a 10uF capacitor when using Uno. Anyway, I managed to restore the boards using a Reset button, see my answer below. I disassembled the wires afterwards so no pictures this time. Wiring was really straightforward, I might attempt it again, once I find a newer bootloader Commented Jul 16, 2014 at 0:26
  • im have the same problem, Chinese Arduino 3.0 with CH340 USB controller, i was thinking the problem is CH340 failure, in my time this arduino is so cheap, i solve that by replacing the entire board, but in order to know whats cause the failure i will be testing changing the CH340 chip in this board. Commented Oct 19, 2018 at 13:42