Cleve,
-Can you actually see the filaments light up?
-Take a measurement (with test clips) across R34 & R35 (R43 on the Rev B). You should get around a 7V drop here. What do you see?
-Take a measurement (with a test clip) on the left and right of R33 and record those voltages.
Cleve, you don't have easy access to a digital camera, do you? A picture sometimes tells - you know.
Shannon