I have a V1.0 Xbox with an X2.6CE it's been in for about a year now and everything has been working fine till about a month ago. When i try to start my xbox it will turn on then turn off, and do that 3 times and Frag. but if i switch the modchip on/off for about 10mins trying to turn it on it will work. I dont remember what bios version i have but i wanna say its fairly new.