I've just gotten the parts needed to set up OctoPrint on my Creality CR-10S, but I can't seem to make it work. I grabbed the latest version of OctoPi, wrote it to my SD card using Etcher, configured my network settings, and plugged everything in (Printer + Pi Cam v2). It didn't show up on the network at all after about 10 minutes, so I reflashed the card and tried again. I ended up plugging it in to my TV to see what was showing up, and all that was appearing on the screen was a colour test. I also noticed that the red LED on the Pi was flashing (4 long flashes then 4 short flashes, repeating). I'm pretty new to Raspberry Pis, so I'm not really sure where to go from here.
As far as my setup goes, I grabbed the most recent OctoPi build from octoprint.org, and I'm using the stock firmware for my CR-10S. I have the latest version of the Pi (3 B+) if that makes a difference.
As I said, I'm a bit of a newb on this, so any assistance would be greatly appreciated