How to perform a COLD RESET on a 4345mfp / 9040mfp / 9050mfp / 4730mfp

To perform a cold reset:
Turn the MFP off and then on.
When the memory count appears on the control-panel display,
press and hold 6 until all three LEDs flash once and then stay on.
This might take up to 20 seconds.
Press 3 four times until COLD RESET appears on the control-panel display.
Press 6 one time. The MFP should continue its initialization sequence.