"It's a single digital signal input"
Uh, and wtf do you think the power button on a computer is?
You are literally pressing the start button and waking an Android-based COMPUTER from sleep, and there are lots of processes that kicks off. There is absolutely zero legitimate reason you should spam the start button. First, it's going to do nothing whatsoever to fix an issue. Second, if it's actually waking the car but you're just not seeing anything on the screen, spamming it like a dumbass is very quickly forcing the computer to wake, sleep, wake, sleep.
Other than making yourself look like a complete fool, you are absolutely not fixing anything and are potentially causing other issues.
But go ahead, spam that button like a moron. Good luck with that.