I had a lot of trouble when I built this section on my wavebubble. One thing to check is inductor; has it bridged, shorted, or otherwise failed. I would also check IC2 and see if it has shorted out.
The L1 value for the LM2733 should be 15uH. I used an LM2731Y and the inductor value was 7.3uH.
I am sure that part of my issues were with the inductors, but I have no evidence to support that claim. At one point I removed everything from the 5v section and placed all new components. I did place C20 (but I ended up removing C60 later on).My RC1a Build Journal