Still tryin' to get this stupid Hulk up and going. Following the advice on pinrepair, I installed an LED and resistor across pins 8 and 15 in the upper right most chip on my CPU. Supposedly this should wait five seconds, and then light. But mine lights right away, which is odd, because the game does seem to boot correctly in the machine. It flickers a bit, but doesn't seem to change brightness back and forth, as it supposedly should do when the game displays the high score. Okay, it thinks the current high score is a backwards "c", but one step at a time. Is the advice no longer valid due to modern LEDs? Or am I doing something stupid?

Update: LED works correctly in the machine. Must have a power issue in my test rig.