Disclaimer: I'm incredibly new to coding (I first looked at a command line nine weeks ago for a class and the class has taught me nothing thus far). Explain as you would to an illiterate ten-year-old.
I have an RPi3B with a Sense Hat connected. I'm using VNC Viewer on a Mac with an ethernet cord to access the Pi, and I have no other way of getting to it, as the monitor I used to originally connect is no longer available to me (unless someone can tell me how?). My Pi was working perfectly earlier today, until I accidentally clicked reboot instead of shut down. I waited for VNC Viewer to reconnect, which it didn't, and then I unplugged my Pi.
Now it will not boot. The red PWR light stays on consistently, the green LED flickers intermittently, but I cannot connect to it via VNC Viewer ("no such host is found") and the Sense Hat is permanently stuck on the rainbow test display.
Is there any way I can fix it on my own? Or do I need a different computer/monitor/something to access the Pi?