Question about Xerox Phaser 7400/DXF Laser Printer

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Control panel displays backwards

I have a Xerox 7400N printer that when I power it up, the control panel displays backwards.  Does this mean the panel needs replaces?

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  • mark334 Jan 14, 2009

    Sorry, backwards in reading from right to left and sometime including upside-down.

  • mark334 Jan 14, 2009

    Also, will it print while there is a "Magenta imaging unit past end-of-life" error? Is there a way around this until I can get a new one? I just need it to print Black for right now. The CentreWare IS says the imaging units have 0 to 400 left.

  • mark334 Jan 16, 2009

    I saw that article and tried all three without success. Could it be a lose cable or something?

  • Rick Kasper May 11, 2010

    By backward are you meaning that the background is black and the letters white? Or the letters are printed backward?

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  • Gary
    Gary Jan 16, 2009

    If you have adequate power being supplied to the printer then the display needs replaced.



    Part number is:



    802K93860 Cover Assy.-OP Panel

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1 Answer

Power up a Xerox 8860 MFP printer


if the control panel display is completely blank but the printer works, you have a faulty panel. I can order it, feel free to contact me, its possible xerox will still cover this under warranty. Call xerox tech support, tell them the issue and see if the control panel would still be covered under warranty eventhough your machine is out of warranty. instructions come with replacing the part.

Mar 04, 2014 | Xerox Phaser 8860MFP Printer

1 Answer

8560 printer shut itself down and will not true back on


The following lists the chain of events that occur when you turn on a printer. You can follow this list as one means of determining if the printer is operating correctly. The exact chain of events depends upon the last power down condition and where the printer has last determined the printhead is positioned, this is stored in non-volatile RAM. The Checklist is the primary reference for troubleshooting power-up problems.

1. Power cord is plugged in and the power switch is turned on:

2. Power supply senses AC line voltage conditions (110 VAC or 220 VAC)

and enables DC voltages. If an overload occurs, the printer turns off the high voltage DC supplies, causing a "blink" effect on the Control Panel LEDs.

3. BIST test flashes the PE LED very briefly at a fast rate until the end of the

next test.

4. The Boot loader performs CPU initialization and RAM test. It then sends

the boot loader version to the serial port.

5. Power-On Self Test (POST) initializes the Control Panel. The Control

Panel LED turns red, green, orange, and then off. The Control Panel LCD then goes black and then clear. The POST version displays on the LCD

and waits two seconds. During this time the operator can press the Back

button to bypass the remaining POST test.

6. Low level Power-On Self Test (POST) diagnostics are performed. The

Control Panel displays status messages as each sub-test is performed.

This test takes about 8 seconds. All LEDs are off during the test.

If POST diagnostics pass, the Control Panel displays the Xerox logo and turns on the green LED.

If the test detects an error, the error message displays on the LCD and the printer flashes the LEDs with a repeating error code pattern.

7. The VxWorks operating system is initialized and engine code is started.

This takes about 15 seconds. The Xerox logo is displayed.

8. Print Engine Self Test (PEST) diagnostics are then performed. These test

the heaters, clutches, motors and solenoids. As each clutch is tested, you hear clicking with four high tones as each motor is tested. This test takes about 30 seconds.

9. The printer now runs the mechanical initialization. The exact sequence
depends on the initial position of the printhead and wiper assembly.

Feb 28, 2014 | Xerox Phaser 8560MFP Laser Printer

1 Answer

8560 shut down and will not turn back on


The following lists the chain of events that occur when you turn on a printer.

You can follow this list as one means of determining if the printer is operating correctly. The exact chain of events depends upon the last power down condition and where the printer has last determined the printhead is positioned, this is stored in non-volatile RAM.


1. Power cord is plugged in and the power switch is turned on:

2. Power supply senses AC line voltage conditions (110 VAC or 220 VAC)

and enables DC voltages. If an overload occurs, the printer turns off the high voltage DC supplies, causing a "blink" effect on the Control Panel LEDs.

3. BIST test flashes the PE LED very briefly at a fast rate until the end of the

next test.

4. The Boot loader performs CPU initialization and RAM test. It then sends

the boot loader version to the serial port.

5. Power-On Self Test (POST) initializes the Control Panel. The Control

Panel LED turns red, green, orange, and then off. The Control Panel LCD then goes black and then clear. The POST version displays on the LCD and waits two seconds.

During this time the operator can press the Back button to bypass the remaining POST test.




6. Low level Power-On Self Test (POST) diagnostics are performed. The



Control Panel displays status messages as each sub-test is performed. This test takes about 8 seconds. All LEDs are off during the test. If POST diagnostics pass, the Control Panel displays the Xerox logo and turns on the green LED.

If the test detects an error, the error message displays on the LCD and the printer flashes the LEDs with a repeating error code pattern.

7. The VxWorks operating system is initialized and engine code is started.

This takes about 15 seconds. The Xerox logo is displayed.

8. Print Engine Self Test (PEST) diagnostics are then performed. These test

the heaters, clutches, motors and solenoids. As each clutch is tested, you hear clicking with four high tones as each motor is tested. This test takes about 30 seconds.




Feb 28, 2014 | Xerox Phaser 8560MFP Laser Printer

1 Answer

Control panel is blank even though power is on


Had experienced the same problem with a Phaser 8560DN, the only solution for that is to replace the panel. You can buy one off Ebay for $50: http://cgi.ebay.com/Xerox-Phaser-8500-8550-8560-LCD-Control-Panel-Display-/110649342908?pt=LH_DefaultDomain_0&hash=item19c336fbbc

Dec 18, 2010 | Xerox Phaser 8560DN Laser Printer

2 Answers

The text on the printer's display shows up backwards, upside down, and when you scroll thru it, things get all cluttered. The printer operates just fine, its just impossible to scroll thru the menus on...


If your 6360 has a blank display, garbled characters, inverted, upside down, or backwards display the control panel is bad and must be replaced.
Here's a video to replace it. It's very easy and takes about a minute.

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Apr 30, 2010 | Xerox Phaser 6360 Laser Printer

2 Answers

Xerox 8550DP error message (16.4)


Even if your printer's front control panel display has not gone bad yet, it could only be a matter of time.

If your printer has never had its control panel display replaced, you can get a free replacement from Xerox, even if the printer is out of warranty. Just call 877-571-7765 with the serial number of your printer.

I think this is due to a known defect from the factory for many of these panels having a bad soder weld which eventually causes issues with the panel, even if not apparent at first. That was the case I had. Just one day out of the blue my panel went blank, some days its lit with no display others the display is upside down or reading gibberish other times it seems to work fine. I tried looking for a bad soder myself but couldn't find it then later found out there was a soder issue via another post on this site and they will replace this panel free of charge.

Dec 10, 2009 | Xerox Phaser 8550/DT Thermal Printer

1 Answer

Please can you advise why the screen goes blank on the control panel on my Xerox Phaser 8560N


Usually this problem means that the control panel is not fuctioning properly. You have to switch the control panel and that will fix your problem. First you can try to call Xerox at 1-800 635 8100 and if your lucky they will replace it with a new one for FREE.

Nov 05, 2009 | Xerox Phaser 8560N Laser Printer

4 Answers

Xerox 8550 DN display does not work and printer does not print


This model of printer has a known fault with the LCD panel.

Contact xerox in your country, who will arrange to have a replacement front panel sent out to you to install


Aug 03, 2009 | Xerox Phaser 8500/DN Printer

3 Answers

The display is blank


This model of printer has a known fault with the LCD panel.

Contact xerox in your country, who will arrange to have a replacement front panel sent out to you to install - eeven though it is out of warranty and at no charge


Jul 21, 2009 | Xerox Phaser 8500/DN Printer

2 Answers

Xerox 7700 won't get past the startup screen


Make sure the image control board is not missing anything.
and maybe try replacing it with a diffrent image control board.
Goodluck!!!!

Feb 25, 2009 | Xerox Phaser 7750DN Laser Printer

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