Hi
recently i had this problem.
I had made a small pcb to measure some instruments in my car with the use of an Arduino pro mini 5v 16hz.
The results were printed to an 0.96 i2c 128x64 Oled Lcd screen.
The arduino starts (powers up) when i set my ignition key to on and stops when i switch off the car ignition
i had it for almost a year in my car working until yesterday that i couldnt see anything in my lcd. I thought that maybe was something in the connection or the display burned.
i checked the connections and everything were ok.. i removed the display and test it to an other arduino and was working also..
i noticed that my pro mini in the car setup was flashing the embedded led like the flashing sketch even i had no function in my code about using that pin(13)-led
i tried my pro mini to an other similar pcb board i had and still no function in my display.
i decided to re-upload my sketch to the pro mini but nothing was happening (the Arduino IDE was showing that was uploading it without coming to an end) so i stopped the uploading ...
after that the pro mini is functioning like it should...
seem like was stacked and needed to try to upload something in order to work again....
any thoughts about this problem? is it common that kind of behavior ? what are the reasons (probably ) that make it stacked ?
thanks in advance