I'm up to the noise section, at the point of testing the top right point on IC33, IC32, and IC31. I am measuring - 15V for all of these. On IC27, point 1, I am getting nothing.
Diodes are positioned correctly, as shown on the silkscreen and build photos. I've checked all my solder joints and re-soldered all the ones that were slightly questionable, and I'm getting the same results.
Also, after about 10 seconds I plug in the PSU, a very subtle high pitched electrical sound fades in, and it doesn't sound good.
I should mention that I did bridge together the joint between D3, and R196. I tried gently heating up and scraping the bridge (I didn't have the right tools at the time. I'm stupid.) and there is a mark/discoloration there now, but no solder. I've since bought a soldering pump and solder wick and cleaned out the joints and replaced both the diode and resistor as needed, but I'm still getting the same results

I'd very much appreciate any help. Thank you.