I have found some Arduino tutorials where the voltage regulator died on board:
However this is not the case for my Arduino Mega 2560.
The Arduino was powered through the 5V pin along with bunch of other sensors. In the meantime it was connected via USB to my laptop sending data through the serial.
Stupid mistake having my multimeter in amp measurement mode I shorted out the 5V line not even on the Ardu but on a sensor but that effectively shorted it for all of them.
After this surprisingly the Arduino perfectly worked kept running the code over restart however I can no longer use the USB port anymore, it does not even show up on the computer like it would not be plugged in.
What I tried:
I tried from both 12V adapter and powering the Arduino through USB (this works fine, I can measure 5V on the V+ in both cases).
I tried it on different laptops. No change.
Did anyone run into similar issue? If so is there any way to fix it?