Wow, fair bit of corned ham on here, these days: seeing as this thread can't get much worse, I'll take the chance to chip in with my zero-post account. I am real, though.

It really sounds like something isn't plugged in, despite your saying it all is. I'd start with making sure the ground and all the plugs on the front panel are connected, including the two which are identical but for the red paint – that one goes at the top.

If that doesn't work, follow those plugs to the other end – i.e to the µP tin – and make sure they're plugged in, as well. As you have to go in the back for that, it's also a chance to check the fuses and voltages, and go from there.

Hello. Thank you for your response. Please see this video I made with the ground connection that I think is the issue.

https://www.youtube.com/watch?v=IHddzuugOJY

Thank you so much.

Noah

Hello. Here is a video of the ground wire I think is the issue. Where would it connect?

https://www.youtube.com/watch?v=IHddzuugOJY

Noah wrote:

Where would it connect?

That attaches under the second screw from the right in the STEP 2 photo here: 

Thanks! I will try this later today.

Noah wrote:

Thanks! I will try this later today.

Just make sure that the connecter is placed between the screwhead and the metal chassis, rather than between the metal chassis and the plastic threaded part.