Your points on the flex cable are still bridged. And you're missing some caps in that last photo. People say those are just to filter out noise. Again, each point from the pads on the flex goes to the left or right side of each cap it sits next to, not from one pad to the other. If it's booting...
The blinking yellow lights are the error code. The long space between the one long, then 3 shorts tells you it's that error. It'll cycle through a few times with that error code. The blue at the beginning just means it's trying to glitch. If success then you'll get the white single light to...
Your SP1/2 connections looked bridged. You're also missing something next to SP1
Should look similar to this. Yours looks like it's just a big blob across the whole cap.
Well if he's just checking to see if it's booting properly before sealing everything up he should be ok. I usually at least have the cover and all that down before turning my devices back on.
But yes photos help a lot of you're looking for help in troubleshooting.
Yes you can boot without all that. Your dat0, cmd, and clk should read around 0.5+, while RST should read around 1.2+ or something. Also, that piece on the right of the flex needs to slide under the frame.
Don't think I've seen any videos online with the back install. But it's pretty easy. The cap is much larger than the ones on the APU. Some people solder straight from the mosfet to the cap. Some use wires, which is what I've done in the past whenever I chose to do that back installation. Here's...