OK, i'm having the same problem and i can give you a little more insight into the problem. When i installed everything, i have a 1.0 so i had to desolder in order to use the pin header (dumb move, should have done wire install), as a result i messed up a trace and my xbox wasnt working at all..., i fixed that up, but now im having the same problem as these guys. I flashed X3 bios 3108 on bank 1234, it would just start up and turn off (no on and off and on and frag, just plain off thats it). then i tried the other 5938 bank or whatever it is and same problem. So now im using my backup bank (hold in eject and power buttons so i get purple X) to flash new bios's. X3 bios 1959 wont even work for me, it just has a blank screen and thats it. any bios newer than 2914 and it just frags or just shuts off. the ONLY bios that works for me is 2914, and it doesnt save any settings when i turn it off. so THATS whats going on...please if anyone can help id really appreciate it.