There's a section missing here about inserting the playing cards to remove the connection to the battery. You can see these in the next screen nut it's not mentioned. Other users have reported shorts and damage due to missing this step. I'm not an expert but I noticed this and wanted to mention it.

I completed this and the screen powers on (goes dark blue) but isn’t showing anything. The iPad makes sounds. Anyone have any tips?

This seems out of order.

I noticed the same thing, and ended up needing to guess to limit insertion to 1mm and 2mm respectively, or avoid those areas.