Upgraded but Phone will not turn on.......

[Guest alfredtv]

Hello I have been scouring the forums for about 3 hours now, I updated my i900 but skipped the part about the drivers..... I went back and tried to update with the correct drivers installed on the laptop but now it's failing at the USB to Phone connection I have tried this on 3 machines already and no luck the phone boots up into WM fine but I can not turn on the phone can someone please help????