Xerox Phaser 8550/DT Thermal Printer Logo
Posted on Dec 10, 2009
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Xerox 8550DP error message (16.4)

Xerox 8550DP error message FYI "front panel data path failure
(16.4)". Called Xerox tech support, they are sending me a new front panel even though my printer is well out of warranty

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  • Contributor 32 Answers
  • Posted on Jul 22, 2010
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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.

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  • Master 526 Answers
  • Posted on Dec 13, 2009
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The front panel seems to have an endless warranty, There was a defect with the control panel. That is why you are getting one under warranty.

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Related Questions:

0helpful
2answers

Printer all of a sudden stopped printing, (LED screen out so unable to read errors). Everything was working fine and then it just stopped printing any more jobs, the red light was on the control panel and...
The inverted, blank, or garbled display is pretty common, a new control panel will fix that and is super easy to install and no tools required. Here is a video that shows how.">
Read full answer
Jul 04, 2010 • Xerox Phaser 8550DP Printer
tip

Xerox Phaser errors 09,005.49, 09,006.41, 09,007.42, 09,008.43
Hi.
This procedure will clean errors like Note: type errors 09,005.49, 09,006.41, 09,007.42, 09,008.43 ('Ink Loader Fault - respectively cyan, magenta, yellow, black)

Start disconnecting the power cord for ten minutes , then remove the black stick check it and put it back. Ensure you are using original cartridges.


Turn the printer on, to enter the Service menu:

1. -You can access the menu using the FRONT PANEL:
  • Press the down arrow, select "Troubleshooting" from menu and then press OK
  • Press the down arrow until you get "Maintenance Tools" and then press OK
  • While holding the arrow at the top, also press the down arrow at same time, to access the hidden service menu.
  • Scroll down the menu until getting "Enter Diagnostics" and click OK. Wait about 20 seconds, then go to Step 3

2 - If you can not Access the menu because the printer is stuck with the error message on display.
  • If the printer is on, turn it off and wait 10 seconds. Turn the printer back on.
  • Wait to see the Xerox logo on display.
  • Before Xerox logo getting steady on display, press and hold the Back button (back) and 'i' (Help) on the Control Panel.
  • Hold down both buttons until the display shows "Beginning Initialization Service Mode". Release the button and the printer will restart showing the menu "Service Diagnostics".


3 - Scroll using the arrows until "Function Menu" appears and press OK

4 - Scroll using the arrows until you get the command "Clear Fault ISC" and press OK twice to confirm.

5 - Now push the "back" button on the control panel (usually at the left), then press "Exit Diagnostic", then OK twice to confirm.

6 - The printer will restart, and the error message will be gone.

7 - Remove the sticks, check them and load them back correctly.


If the error does not clear, then it is due to a fault, in which case contact Xerox technical support at the number listed on the owners manual.
Read full tip
on Jan 30, 2010 • Xerox Phaser 8550DP Printer
1helpful
1answer

I get a print out from start up which says "Hardware Failure: Front Panel Data path failure (16.4). What is that?
Here's a link to the error codes, note the 8550 codes are on the right side. (See POST codes.)
16.4 is a soft error code, i.e. doesn't prevent your printer from starting up, but generates a printed report. "Control panel data path failure, bad data returned." See page 4 for instructions recommended in this case.
You can access a remote dignostic tool from Xerox for your machine here., and here are support center instructions.
Here is the home support page for your model.
There may be firmware updates available for your printer that could help to correct some issues.

I hope this information allows you to resolve this issue. If you need further assistance, please post back with a comment to this thread.
If I've managed to answer your question or solve a problem, please take just a moment to rate this post....thanks!
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Jul 24, 2009 • Xerox Phaser 8550DX Laser Printer
13helpful
1answer

Xerox 8550 hardware failure front panel data path failure 16.4
It sounds like the display panel has gone bad. Possibly the text is garbled or only half shows up??

If you contact Xerox and tell them, I believe they will send you a replacement display panel - even if your printer is no longer under warranty -- IF your printer has never been sent a replacement display.

I've had this happen on several of these printers - I believe they know there is an issue with the display panels, which is why they are sending replacements for free.

I find the easiest way to contact them is to go through the support section at xerox.com and search for that error, then hit contact us at the bottom of the page. It'll ask for your contact information as well as the serial number of your machine.
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Jun 09, 2009 • Xerox Phaser 8550DX Laser Printer
9helpful
3answers

Data path failure 16.4 xerox 8500
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


Read full answer
Dec 09, 2008 • Xerox Phaser 8500/DN Printer
8helpful
3answers

Xerox Phaser 8550dt printer
That is a known problem with the 8500 phaser family.
Contact Xerox at 1-800-835-6100, They WILL replace it for free. It is a known problem.
I really believe that display is failing. very common problem.
Just tell them the display is blank when you call. But they are faulty. Very faulty.
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Sep 21, 2008 • Xerox Phaser 8500/DN Printer
0helpful
1answer

Phaser 8550 Panel
It comes with directions. It is real easy to replace. Just call 10800-835-6100 and have your serial number ready. They will ship it out.
Should take 5 minutes to replace. Yeah a computer tech is quite able.
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Aug 22, 2008 • Xerox Phaser 8550DP Printer
4helpful
3answers

Xerox Phaser 8550dt printer
The display panel needs to be replaced. The part number is 802K93650. We sell them for $160 plus shipping. Our number is 574-243-1176 if we can help.
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Jul 23, 2008 • Xerox Phaser 8500/DN Printer
0helpful
1answer

PHASER 8550DP
Your yellow ink sensor is stuck

Testing the Ink Out Sensors Use this procedure to test if an Ink Out Sensor?s flag works correctly.
1. Remove ink sticks from the ink loader?s channels.
2. Place the printer in Diagnostics Mode by:
Service method
a. Turning on the printer and as XEROX appears on the screen, press and hold the Back and Help button until Beginning Service Mode Initialization appears.
b. Scroll to and execute test Monitor: Sensors
Customer method
a. While error code displayed, press UP arrow and OK key.
b. Scroll to Troubleshooting: Service Tools: Enter Diagnostic Mode. (Printer restarts).
c. Select test 82: Monitor Sensors. Press OK.
d. Scroll to 01: Exit Diagnostics and press OK to return to customer mode.
3. Insert the clean eraser end of a pencil thru the lowermost oval slot. (The eraser end of a pencil closely simulates the bottom rail shape of a Xerox ink stick.)
Slide the pencil down the white channel guide until the sensor is tripped. A sensor change is displayed on the control panel. When the flag is depressed, the front panel will read <color> Ink Present H. When released, the reading will change to L. The test will only display a reading when a sensor change occurs. If a flag is stuck, no sensor reading will be displayed on the front panel. If it doesnt change states you need to replace the ink loader
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Mar 08, 2008 • Xerox Phaser 8550DP Printer
0helpful
1answer

Xerox phaser 6250 NVRAM Failure
Cycle power, try cleaning the CTD (ADC) sensor and toner full sensor. This is what Xerox has to say about the NVRAM failure: On the front panel, press the key labeled i to view information about the error. Record the error code number. Turn off the printer. Reseat the fuser. Reseat the imaging unit. Reseat the toner cartridges. Turn on the printer. If the error continues to be displayed contact service. To be on the safe side you can follow the instructions here on the procedure to replace the transfer roler: http://office.support.xerox.com/SRVS/cgi-bin/webcgi.cgi Good luck
Read full answer
Mar 25, 2006 • Xerox Phaser 6250DP Laser Printer
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