I just completed a project with Digispark. But I need to use the 5th pin which was set as "reset pin" by default. So I searched for a solution to use it a regular pin and found this Electronics Project: Digispark Overview & How To Fix Resetting - Pin 5 Reset - Digispark vs. Arduino - YouTube
Which is basically running the Arduino ISP example while Digispark is connected to Uno via couple of pins. After this process I was able to upload blink example to the Digispark just to test it. And after that Digispark is not recognized by any computer. I tried several ones but no.
If I power the board instead of connecting via USB I see that blink example runs but this is not the case with USB connection. So I suspected about pins 3 and 4 because they are for the USB connections. But nothing is connected to those pins. I even desoldered and resoldered all pins. Nothing changed.
What did I do wrong?