I have this same problem, but I'm fairly sure my LCD cables are oriented correctly: red line to pin #10, or pointed "up" when the electronics box is mounted.
Things that I've checked:
- power supply is correctly set to 110V (I'm in US)
- power cables seem seated correctly
- green LED in the power supply lights up
- green LED in the electronics box lights up
Any hints or suggestions would be much appreciated.
Thanks in advance.
After 4 passes through the instructions, I realized I had LCD cables 1 and 2 swapped. The middle picture showing the two LCD cables confused me as to which one was "in the front". LCD powers up now - phew!