Hello, I bought an arduino uno some time ago, and with time and accumulation of errors I started to burn some I/O pins, so I bought a new arduino uno chip and replaced it on the board.
The problem now is when my arduino boots, ie, I plug it into the usb and the led on pin 13 starts flashing many times like this ... ... ... and it doesn't stop. If I turn the serial monitor on (even without any serial communication programmed) the program I previously uploaded into the arduino starts normally. Just to be sure I wrote a code that brings all pins to HIGH just to test and the led on pin 13 only stops blinking when I turn the serial monitor on or upload the program again. The chip comes with a sticker that says ATMEGA328 UNO BL. I don't know if this details are enough, but if something else is needed just ask.