noob needs help fixing ppc

[bigdaddyppc]

my vx6700 wont boot. a hard reset gets as far as
press space to continue. i press space and it dies.
i think i can faintly see the word serial on the screen
after it dies.
worse, my usb connector on my ppc is shot.
how do i reload a rom through my sd card ?

or other suggestions ?

thanks all