So I compared the pinout of my cheap Chinese Arduino clone to the real thing and this is what I found:
I mean - that seems pretty much the reason I’m getting nothing in or out right? Hopefully?
All the continuity testing was good - so unless the opto-isolators are just dead - I’m hoping this is it. Unless it’s just a silkscreen error. I guess I should confirm that before giving in and buying an official Arduino mega lol.