I have a 2.3B Pro and had the power-on, power-off 3 times problem. I had used the alternative D0 connection point on the underside of the pcb. Once I moved the D0 wire to the top of the pcb solder point the power-on/off problem stopped.
However now my mod doesn't seem to work. I've flashed it with different bios's (evox,X2,etc) and whenever I power-on my xbox it loads the retail bios off the xbox motherboard. I have a version 1.0 xbox and both blue led's light along with the green led on the external DIP switch board. It seems as though the modchip is not communicating with the motherboard.
I used the pin header install method and all solder points are good. As a side note I modded my other Xbox with an earlier version of the X2 Pro and have had no problems with it. As a matter of fact I took it out of my xbox and placed it in the xbox I'm currently modding and the older X2 worked, so I know my solder points are good.
I'm beginning to think these 2.3b's are crap. Any feedback/Solutions?