Question about HP LaserJet 4250n Printer

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No display and no light indicators when powered on

Pls can you advice me on my HP LASERJET 4250n printer. It shows BLANK on the display panel not lights come on. The fans start up and the fuser unit initializes fine

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  • Anonymous Mar 20, 2014

    originally power control panel said ready but nothing happened when I pushed any start buttons, now it powers up but the control panel is blank

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If the printer control panel is blank when you turn on the printer, check the following items.
1. Make sure that the printer is plugged into an active electrical outlet that delivers the correct
voltage.
2. Make sure that the on/off switch is in the on position.
3. Make sure that the fan runs briefly, which indicates that the power supply is operational.
4. Make sure that the control panel display wire-harness is connected.
The control-panel wire-harness connector can easily be disconnected when you install the top
cover. If the control panel does not work after the top cover is installed, verify that the wire-harness
connector is fully seated into its DC controller PCA connector.
5. Make sure that the firmware DIMM and the formatter are seated and operating properly.
6. Remove any HP Jetdirect or other EIO cards, and then try to turn the printer on again.
If the printer control-panel display is blank, but the main cooling fan runs briefly after the printer
power is turned on, try printing an engine test page to determine whether the problem is with the
control-panel display, formatter, or other printer components.
Engine test page
To verify that the printer engine (all printer components except the formatter, formatter DIMMs,
EIO products, and the stacker or stapler/stacker) is functioning, print an engine test page. Use a
small, non-metallic, pointed object to depress the test-page switch, which is located on the right
side of the printer
The test page should have a series of vertical lines. The test page will print from the last tray you
printed from. However, if the printer has been turned off and then back on since the most recent
print job, the page will print from tray 2. The printer will continuously print test pages as long as
the test-page switch is depressed. The printer will not print a test page if it is in PowerSave
mode.
A damaged formatter might interfere with the engine test. If the engine test page does not print,
try removing the formatter and performing the engine test again. If the engine test is then
successful, the problem is almost certainly with the control panel, or the cable that
connects it.
Hope this helps

Posted on May 24, 2008

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Need to perfrom nvram init on HP 4250


To initialize NVRAM, turn the printer power off. Remove any installed accessories (for example, a stapler/stacker). Turn the printer power on, and then hold down (SELECT button) when the memory count begins. Continue holding down until all three printer control-panel lights flash once and then remain on. This might take up to 10 seconds. Press (UP ARROW button). Press the PAUSE/RESUME button (LJ 4200/4300) or the MENU button (LJ 4250/4350). The display should show SKIP DISK LOAD. Press (UP ARROW button) until NVRAM INIT is highlighted. Press (SELECT button) the printer initializes NVRAM and then continues its power-on sequence.

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My HP laser jet 4250n printer turns on but the display screen is blank --there is no message. the ready light, data light and attention light all come on


Could be bad Control Panel or bad Formatter.Start with the Control Panel, it's cheaper.1st make sure the cable is attached to it.

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Sir, We have a hp laserjet 4250n printer since


Replace the fuser unit (they last about 75K pages in my experience)

1. Power down the printer and unplug it
2. Remove the fuser from the back side of the printer
3. Replace the fuser unit with a new one
4. Turn the printer back on

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A wire is broken off of the tray 2 lift motor. It can be resoldered.

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Its possible there was a voltage spike immediately preceding the power outage, thereby burning out the electronics. If you do not have a surge supressor protecting your office computers and printers, you should get one.

Jun 11, 2009 | HP LaserJet 4250n Printer

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HP 4250 laserjet will not go through the start up sequence.


Well first do what joe said about checking the Plug on the Display, <Here's another solution did you also check the cables( Power Cables going to the format bd ? Sometimes you can bent those pins easily, I have seen it and ok I done it once on HP 4 plus when i first started out as a tech ? Check that ? May I asked What was the reason for replacing the Formatter board in the first Place ? were you getting an error ?


Mar 19, 2009 | HP LaserJet 4250n Printer

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49.FF95 SERVICE ERROR


Please look on: http://www.fixyourownprinter.com/
There are much solutions of this problem listed ...

For example this (it see good):
http://www.fixyourownprinter.com/forums/printer/46157#1
HP Laser Jet 4250n by TLYNN (3/20/07 12:22 PM) reply + / -
Anybody know the error code "49. FF95 Service Error"
We can't get around this...


Firmware Error 49 by Stephen (edited 3/20/07 12:29 PM) reply + / -
It could be a bad job.

First disconnect it from your network and any PC it might be attached to.

Power cycle it, then if it goes to ready status try the built in test pages, do they work?

If the printer will go to ready status and you have a parallel cable with the proper connector, then you can try upgrading the firmware from a PC, you can also try to upgrade the firmware over the network.

More reading:

http://www.fixyourownprinter.com/search/forums?f=&q=49+4250


Re: HP Laser Jet 4250n by TLYNN (3/20/07 12:59 PM) reply + / -
Still won't go back to ready status. Turns on to the same error code....


Cold Reset HP Laser Jet 4250n by Stephen (3/20/07 1:03 PM) reply + / -
Try a cold reset, it will reset the JetDirect settings, but it's the next step.

Cold Reset:

Power off printer, wait about 5 seconds, then power it on, when asterisks start appearing on the display press and hold the check mark until all 3 lights come on solid, then use arrow keys to find cold reset and push check mark to perform the reset.



Re: HP Laser Jet 4250n by TLYNN (3/20/07 1:06 PM) reply + / -
Thank You so much for your help... but that didn't work either. Same error code showed up.


Re: HP Laser Jet 4250n by Stephen (edited 3/20/07 2:27 PM) reply + / -
Then you probably need to replace the formatter.

Do you have another printer you can swap parts with?

There is a slim chance the memory DIMM is bad, you can try it with the DIMM removed, if there is more than one DIMM you can try installing just one and then the other.
-----------------------------

A 49 error indicates that the formatter could not understand or execute an instruction within a file or cannot interface with an accessory, DIMM, or EIO device. Troubleshooting 49 errors is done through process of elimination. First determine if the printer functions in a stand-alone mode then test communications to the printer.

These errors can be divided up into two categories; the associated troubleshooting depends on the circumstance the 49 errors are occurring.

A 49 error is always followed by Hexadecimal numbers, for instance, 49.00FF. The Hex code is a memory address. Most Hex codes are not documented.


Re: HP Laser Jet 4250n by dmzcompute (3/20/07 2:26 PM) reply + / -
I do not see anywhere where the printer has been disconected from everything. If you have not done so already disconnect every cable from the printer with the exception of the power cable and turn the printer back on and see if you get the error and if not report back here for further instructions.


Re: HP Laser Jet 4250n by Stephen (3/20/07 3:28 PM) reply + / -
You might also try disabling the embedded JetDirect.

To disable the embedded LAN port

Turn the printer power off.

Power on the printer and watch for the memory count to begin.

Hold down the SELECT (Checkmark) button, when you see the memory count begin.

Continue holding down the SELECT (Checkmark) button until all three printer control-panel lights flash once and then remain on. This might take up to 10 seconds.

After the message SELECT LANGUAGE appears on the display, press the UP ARROW button or the DOWN ARROW button until EMBEDDED LAN DISABLED appears on the display

Press the SELECT (Checkmark) button. The printer then continues its power-on sequence with the embedded LAN disabled.

If this works the JetDirect built into the formatter is bad, you can either replace the formatter, or buy an JetDirect to install in an EIO slot.


Re: HP Laser Jet 4250n by Trev Pearson (3/20/07 10:08 PM) reply + / -
The only other thing to try, before spending money, is to get the network administrator to clear the print queue for that particular printer and then turn it on.

The theory being that a 'corrupt' print job is still in the system and as soon as the printer is turned on, that 'corruption' floods the network card with garbage which promptly goes 49.

If the printer comes 'ready', great. Then do a firmware upgrade. If not, then you will have to spend money on a new formatter.

Regards

Trev


Re: HP Laser Jet 4250n by roadrunner178 (6/21/07 2:09 AM) reply + / -
hi.
With a cold reset ,my problem solved.
try this as a first solution.
thank you


Re: HP Laser Jet 4250n by Anonymous (7/31/07 1:20 AM) reply + / -
Re: HP Laser Jet 4250n by Stephen (3/20/07 3:28 PM) reply + / -
You might also try disabling the embedded JetDirect.

To disable the embedded LAN port

Turn the printer power off.

Power on the printer and watch for the memory count to begin.

Hold down the SELECT (Checkmark) button, when you see the memory count begin.

Continue holding down the SELECT (Checkmark) button until all three printer control-panel lights flash once and then remain on. This might take up to 10 seconds.

After the message SELECT LANGUAGE appears on the display, press the UP ARROW button or the DOWN ARROW button until EMBEDDED LAN DISABLED appears on the display

Press the SELECT (Checkmark) button. The printer then continues its power-on sequence with the embedded LAN disabled.

If this works the JetDirect built into the formatter is bad, you can either replace the formatter, or buy an JetDirect to install in an EIO slot.

THANK YOU WERY MUCH
FROM TURKEY
ZAFER

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GO ON LINE AND TYPE INTHE FOLLOWING INFORMATION; EXAMPLE:

HP LASERJET 4250N PRINTER ERROR MESSAGE KERNEL
ENTER
"" "" "" ILLEGALOPERTORSEQUENCE
ENTER
HP LASERJET 4250N ENDCHAR ERROR
ENTER
HP LASERJET 4250N PRINTER POSITION 24 ERROR
ENTER

HP LASERJET 4250N ERROR MESSAGE [ CODE # ]
ENTER

ROD THE CANDYMANGANDY

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First remove the control panel from the machine and make sure that the cable is seated well to the panel and the control board. If they are remove both cable ends and reseat them.

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If the printer control panel is blank when you turn on the printer, check the following items.
1 Make sure that the printer is plugged into an active electrical outlet receptacle that delivers the
correct voltage.
2 Make sure that the on/off switch is in the on position.
3 Make sure that the fan runs briefly, which indicates that the power supply is operational.
4 Make sure that the control-panel display wire-harness is connected. See the hint in the
procedure for Top cover.
5 Remove any HP Jetdirect or other EIO cards, and then try to turn the printer on again

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