I bought an Eros kit, yesterday I got to the point where I tested the regulated B+ supply (page 58 of the manual.) Only 3 LEDs lit, one channel B+ was 224.5 volts the other was 239 volts. I checked all wiring, part orientation, etc. Finally I unsoldered the unlit HLMP 6000 LED and found it to be open (both directions.) "Stealing" an HLMP 6000 LED from one of the plate load / servo boards and soldering it into the shunt regulator board confirmed that this was indeed the problem. With the "stolen" HLMP 6000 LED in place of the open one, the board worked fine- all 4 LEDs lit, and B+ was supplied at 224.4 volts for each channel.
How do I get a replacement part? I sent an email to Queen, but I've yet to receive a reply. I can't complete the kit without the HLMP 6000 LED.