Question about HP LaserJet 4p Printer

1 Answer

Gears? I replaced a dead power board. this solved my 51 error but when I turn on the printer now after rebuilding it, it sounds like the gear that runs against the toner is slipping (ratcheting) I have tried another toner cartridge out of another working hp 4p withe same results. I did not have this problem before rebuild. Thanks, Bob

Posted by on

1 Answer

  • Level 2:

    An expert who has achieved level 2 by getting 100 points


    An expert that got 10 achievements.


    An expert that got 5 achievements.

    Vice President:

    An expert whose answer got voted for 100 times.

  • Expert
  • 233 Answers
Re: gears?

Sound like the fuser to me, remove cart and turn on, does it still make the noise? if so, it is the fuser if not there is a gear drive assy, check the gears

Posted on Jan 06, 2008

Add Your Answer

0 characters

Uploading: 0%


Complete. Click "Add" to insert your video. Add


3 Points

Related Questions:

1 Answer

Model 2820. How do I solve engine error?

Try Engine test:
turn on device open tray 1 and load paper (1 is the manual feeder)
when you open tray 1 there's an engine-test switch, found it and press it

Engine error are also cause too much resistance from toner, fusor or gears. Remove toner and check that it roll with your fingers on gears, and do same with fusor (could be very hot warning - should be hard move it but not too much) and with printer off and fusor removed check if you can move any gear manually (this can be harder but will help you determine if it's board error or resistance cause a gear problem).
Any previous error happened with the printer can help to diagnose (jams, power off while printing...)

Sep 17, 2015 | HP LaserJet Printers & Copiers

1 Answer

5120 code error

Any of these error codes (51.20 51.21 51.22 51.23) points to a failure with one of the laser scanner assemblies on the HP Color LaserJet 4610 an 4650 series. To solve these error codes, replace the corresponding laser scanner. Sometimes when the laser scanner fails you will also hear loud noises (often higher-pitched noises like screeching sounds); the noises can be another sign that the laser scanner needs replacing.

For help press
alternates with
A printer error has occurred.
X Description
1 beam detect error
2 laser error
Y Description
0 no color / black
1 Press to continue.
2 Turn the printer off and then on.
3 Reseat the connectors between the
laser/scanner and DC controller PCA
(J1009 - J1012).
4 Replace the defective laser/scanner
assembly. Calibrate the printer after
replacing the laser/scanner.

Mar 17, 2014 | HP LaserJet 4650n Printer

1 Answer

My minolta EP3000 CSPRO shows error code coooo

Main motor remove the fuser unit the hot part check for broken gears also look in the back where the fuser go for bad gear, then check the drum assy. for old cleaning blade if yellow replace it or the drum is stuck use thumbs on the edge of the drum to turn it clockwise looking at the front counter clockwise messes with the cleaning blade. Worse case the motor is dead and or the control board, you try the below web site try for parts

Precision Roller Printer Toner Cartridges Parts and Supplies Office...

Feb 25, 2011 | Minolta EP1031/1031F CS/PRO Copier

1 Answer

Why is my samsung clp making a clicking noise?

Is the printer making a clicking sound when it is printing? Or is it just making a clicking sound but there are no light and the printer appears to be dead except making a clicking sound?

I know of a cause for either case.

Case 1. It is clicking when printing. Sometimes the toner cartridges are not seated properly in the imaging unit, and causes the gear on the cartridge to slip making a clicking sound as the gear is being turned. Try pulling out the cartridges and try turning the gear. It should turn smoothly without binding. If it binds, there is not much you can do about it except replace it when it goes empty. Reinsert the cartridge and check that it inserted completely into the imaging unit.

Case 2. Printer is dead, not printing except making a clicking sound. This is due to the power supply board failure. Usually the failure is due to a blown filter capacitor on the power supply board. The power supply is located on the right side of the printer. Remove the right side panel to get access to the board. The board can be either repaired or replaced. Hope this helps you.

Feb 22, 2011 | Samsung CLP 300 Laser Printer

2 Answers

How to fix unable 51 error message

The problem with the error 51 means that something is in the paper system, but not always is true. I Had the same error but no paper jam was in the printer, I had to desasemble the printer and I found that it was a problem with the end gear of the roller charge paper. Some times when the paper gets jam, the first reaction is to pull over the paper, it causes the end gear gets out from its position and the printer can`t load the paper. It causes the error 51 in the printer. To solve this problem you need to attach the gear to its position, to do this is necesary to desasemble the printer. I hope it can help to solve this problem.

Nov 08, 2009 | Brother Multi-Function Center MFC-240C...

1 Answer

Error code 51

That error is telling you that the cleaning assembly is not cycling properly. Usually I find paper scraps on the right stopping it or a broken drive gear that means the entire engine assembly neeeds to be replaced.

Jul 23, 2009 | Brother MultiFunction Center MFC-440CN...

2 Answers

I have a MFC-665CW error code 51 unable to clean

change your cartridge insert new cartridge then solve it please send me reply

Jun 26, 2009 | Brother MFC 420CN All-In-One InkJet...

1 Answer

Won't turn on....

Have you recently replaced the colour PCU? It may not be seated properly, otherwise there is likely a problem with it, and it's not turning (ie: a broken gear). It could also be the PCU drive motor, or control board. Sounds like you may need a tech to get to the root cause unless you have a spare PCU to try?? This also explains the colour registration problem.

Feb 23, 2009 | Ricoh Aficio CL2000N Laser Printer

2 Answers

Unable to clean 51

Normal 0 Driver could be corrupt.
Disconnect the printer or at least be sure it is turned off. I'd do both and reinstall the CD software program that came with the printer. When the software program asks you to connect the printer to the USB port, do so and it should again work properly.
Hope this helps. Bud

Sep 25, 2008 | Brother Multi-Function Center MFC-665CW...

Not finding what you are looking for?
HP LaserJet 4p Printer Logo

Related Topics:

85 people viewed this question

Ask a Question

Usually answered in minutes!

Top HP Printers & Copiers Experts


Level 3 Expert

94267 Answers


Level 3 Expert

7983 Answers

Brian Sullivan
Brian Sullivan

Level 3 Expert

27725 Answers

Are you a HP Printer and Copier Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides