I'm still very new at this so please bear with me.
I'm trying to program my Arduino Pro Micro without a bootloader, using my Arduino Uno with 'Arduino as ISP' as a programmer.
The actual programming of the board goes smoothly and when connected to the 5V output of the Arduino Uno, the Pro Micro works as it should, creating a serial port over a USB cable connected to my computer. However, when disconnect the 5V jumper andI only connect the USB cable, the only thing that happens is that the power LED lights up. No code seems to be run.
What am I doing wrong?