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

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