I had the same prob with network flashing...you can't do it until AFTER the chip is flashed with the bios....
(The XBOX will not load the bios by itself when you put the disc in .... once you boot up your XBOX, boot to the backup bios by holding the eject on/off switch....then follow from the post above ..... "press down three time and the press "a" ...the drive will eject, put in your disc ....after a minute or so your xbox should turn off - and your bios should be flashed....
I know it is difficult not being able to see what you are doing....
(The XBOX will not load the bios by itself when you put the disc in .... once you boot up your XBOX, boot to the backup bios by holding the eject on/off switch....then follow from the post above ..... "press down three time and the press "a" ...the drive will eject, put in your disc ....after a minute or so your xbox should turn off - and your bios should be flashed....
I know it is difficult not being able to see what you are doing....