HP 4345 M4345 Laser Printer Cold Reset
To perform a cold reset:
Turn the MFP off and then power back on.
When the memory count appears on the printer control panel display, Select and hold 6 until all three LEDs flash once and then stay on. This might take up to 20 seconds.
Select 3 four times until COLD RESET appears on the printer's control-panel.
Select 6 once.
The MFP should continue its initialization sequence.
The process is complete
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