I was running Code for some Neopixels WS2812B on my Nano, as suddenly the Nano cut the connection to my PC. The Neopixels freezed in their last state, so my Datapin didnt output anything. When I reconnect the Arduino to my PC, my PC does not recognize the Arduino anymore. But The PWR LED is turning on and the L LED is blinking very fast, but with a very low brightness. If I press the reset button on the Nano, the L LED stops blinking, but after I relase it it is contiuing with the blinking.
When I power up the Arduino with an external 5V power supply it seems to work fine. It runs the last Sketch and I could even program the Arduino with the external 5V power supply connected to +5V and mini usb both plugged it.
Can someone help me to fix the Nano so that I can program and use it again with only the USB-Mini cable plugged in to it?
When only the USB cable is plugged in the USB-Diode measures a Voltage of 1.9V(if that helps).
Thank you for your time