HP 4101mfp manual Basic troubleshooting, Is Power On, Successful?, Is the product ready?

Basic troubleshooting

Verify that the conditions in the following lists are met before troubleshooting a specific MFP problem.

Table 15. Basic troubleshooting

#	Verification steps		Possible problems	Solutions
1	Is Power On		No power.	1. Verify that the product is plugged in.
	successful?			2. Verify that the power cable is functional and that the
	When power is turned on			power switch is on.
	the following events take			3. Verify that the power cord between the print unit and
	place:			the scan unit is correctly installed and fully seated at both
	●	The flatbed and		ends. See “Back view” on page 21.
		printing-unit fans		4. Perform a print-engine test (see the HP 4100 series
				printer service manual for more information).
		start operating.
				5. Perform the power-on checks as instructed in the HP
		The control panel
	●			4100 series printer service manual.
		illuminates and the
		initialization
		screens appear.
	●	The CPB LEDs
		illuminate.
	●	The optical unit
		moves to the home
		position and the
		scanning lamp
		illuminates for
		about 3 seconds.
2	Is the product ready?		The control panel displays	Consult the list of common messages in this chapter. See
	The control panel should		an error.	“Control-panel messages” on page 120.
	function without error
			The control panel is not	Verify that the power cord is properly plugged into its
	messages and the READY
			functional, the display is	receptacle on the flatbed unit. See “Back view” on
	LED should be illuminated.
			blank, or garbled text	page 21.
			appears on the display.	Verify the control panel cable is full seated at scanner
				controller board location J1210. See “Scanner controller
				board connectors” on page 62.
				Verify the connector at the other end of this cable is fully
				seated. See “Disconnect the scan unit cable” on page 90.
				Verify that the control panel cable is fully seated in it
				connector on the control panel door. See “Release the
				control-panel door-support pins” on page 80.
				Verify that no power-on defect exists. See “Power
				malfunctions” on page 116.
				Reseat the firmware and memory DIMMS. See “Copy
				processor board” on page 57.
				Verify any optional devices (for example a duplex
				accessory) are correctly installed.
				Replace the control panel. See “Control-panel door” on
				page 79.
3	print?Do information pages		an error message.	“Control-panel messages” on page 120.
			The control panel displays	Consult the list of common messages in this chapter. See
	Print a configuration page.
			Media does not move	Isolate the media problem. See “Media troubleshooting”
	The configuration page		smoothly through the	on page 140 and “Jam troubleshooting” on page 128.
	should print without paper-
			flatbed paper path.
	feed problems or print-
	quality defects.		Poor print quality.	See “Image-formation troubleshooting” on page 136.

114 Troubleshooting C9148-90909