Well, I installed my infinity and it worked like a charm.
Somehow or the other, I managed to bungle a firmware upgrade, and now it refuses to boot.
Holding down reset to enter 'recovery' mode does not seem to work. I verified the wiring, and sure enough, the 'rst' pad on the infinity is pulled to ground when the button is pressed, so I believe I've ruled out wiring. I've tried every possible timing combination on the reset button.
I noticed a note on infinitys site that mentions a component screwup on the reset line (someone loaded the wrong reel of components into the machine, I guess), but this appears to be for the MX4 chip.
The hardware looks identical. Since I'm at work and unable to tear the damn PS2 apart again to see if I've got a bum part, has anyone bumped into this? Is there any chance that my Infinity is really a reflashed MX4? Why is the sky blue? Do I ask too many questions? ;)