Should effect +VE to the injectors, but they will have no -VE pulse to open them without the CPS, so yes essentially they end up with no power, as to have power requires both +VE and -VE

On some ECU's it will be the other way around and they will have -VE but not +VE pulse, depends on if they are + or - switched in the first place, but either way they wont ever operate.