The heartbeat LED indicates that the formatter is functioning correctly. While the MFP is
initializing after you turn it on, the LED blinks rapidly, and then turns off. When the MFP has
finished the initialization sequence, the heartbeat LED pulses on and off.
If the heartbeat LED is off, the formatter might have a problem. Contact an HP-authorized
service or support provider. See the HP support flyer, or go to
Chapter 10 Solving problems