"Remember when you are loading a sketch to it, you select UNO as the board type, not Nano." - That's why I burned (let it die) my Arduino Nano. I did not know!
One more proof that the Bootloader is recorded and the same size as Arduino Uno Flash memory: Flash memory size = 32768 bytes.File in attachment
Bootloader is 2048 bytes starting at 7800
avrdude: stk500_recv (): programmer is not respondingavrdude: stk500_getsync () attempt 10 of 10: not in sync: resp = 0xf8
STEP 3 - Burn Bootloader- Keeping all the wires intact and unmoved in step 2, connect the working arduino back to the computer with the USB- Go to Tools>Serial Port>COM (and make sure again that the correct COM port is chosen - ask me if you don't what this means)- Go to Tools>Board>Arduino Nano w/Atmega 328 (this time we choose the non working arduino, in my case nano atmega 328)- Go to Tools>Board>Arduino/Genuino Uno (this is the difference to the tutorial!!!)- Go to Tools>Programmer>Arduino as ISP- Go to Tools>Burn Bootloader (this is it, after the LEDs stop flashing your board is ready to use !!!).Do all of the above steps in ORDER !!! no skipping stepsAlways make sure that the correct COMM port and correct board are chosen before uploading a sketch to avoid errors...