I soldered my spider in too. Same problems. I got the Xbox on Ebay and it had a previous screwed up chip install that I had to fix. Now I have found the the weirdest solution to get my Spider to work. While frusttrated at the 3rd solder install attempt with everything looking and measuring good, I started poking all around the chip and motherboard with my finger. WAM. All of a sudden the spider BIOS loaded. I finally found that touching LPC pin #11 with no pressure nessassery it starts. I soldered a wire to it and started laying it in different spots thinking that for some reason it was heat sensitive, but its not. I'm pretty new to this Mod stuff so I figure maybe anything is possible. Anytime I touch the wire insulation or bare with my finger or hand it loads properly. I have a 3rd party controller and have bought a M$ one yet to further test the chip, but I assuming that it is. I just have to touch the wire till it loads. Maybe its the screwed MB with my Xbox, something strange with the Spider I got, or maybe something I overlooked while repairing the MB, but maybe this strange fix might help. Sorry for the long boring response.