HP LaserJet 4P

How to Identify and Fix Common Problems ?

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This noise can be due to any one of the following: A piece of paper, or other obstruction, is stuck somewhere inside the printer. One of the toner cartridges or photo developer units may be installed incorrectly or may be damaged. A door or cover may not be closed completely.
A grinding sound is heard when the printer is turned on or when it is printing. Blinking lights may accompany the noise. The problem can be caused by a carriage stall or a paper jam.
A clicking sound may occur if the stirring spring assembly inside the Toner Cartridge catches on a rib within the cartridge, preventing the stirring spring and its gear from turning. The resulting click is caused by the drum`s toner drive gear slipping against the stirring spring gear on the Toner Cartridge.
One common failure part on the HP LaserJet P4014, P4015, and P4515 series is a set of worn plastic gears in the fuser drive assembly. The primary symptom will be a grinding-type noise coming from the rear of the printer.
When a computer fan spins loudly for a long period of time, there might be an issue with a fan, or the computer might be overheating. Adjust the power settings, clean the fan vents, check for suspicious processes, and then update the BIOS to help reduce the internal temperature.
That grinding noise means something is loose inside the hard drive, where there simply shouldn`t be anything loose at all. That typically means that when that thing becomes completely loose, it`s going to go flying around in there and cause all sorts of destruction within the drive itself.
The noise you are describing could be the carriage sticking or a small piece of debris inside the unit. You could go thought each of these documents step by step to clean out your printer to see if it resolves the issue.
HP LaserJet P3005/M3027MFP/M3035MFP Grinding

After replacing the fuser you may hear a rumbling sound from the rear side of the printer. This rumbling, or grinding, is due to the newly replaced gears working with the worn fuser drive gears.

Dot matrix printers create noise when the pins or typeface strike the ribbon to the paper, and sound-damping enclosures may have to be used in quiet environments. They can only print lower-resolution graphics, with limited color performance, limited quality, and lower speeds compared to non-impact printers.
Clean the Air Vents

As time goes on, dust and debris can accumulate in and around the air vents. This can hinder airflow, cause abnormal fan operation and laptop overheating. So, you should clean the air vents to fix the issue of HP laptop loud fan.

If you notice the computer fan running constantly and making an abnormal or loud noise, this might indicate that the computer is not running as efficiently as possible, and/or clogged air vents. It is important to keep dust from accumulating in your computer and ensure adequate ventilation to help reduce heat.
The best thing to use to remove dust is a can of compressed air. Remove the side or front panels of the case and then use the compressed air to clear the dust from any dust filters. Any obvious collections of dust at the bottom of the case can be wiped away or, if you`re very careful, a vacuum might also do the job.
Paper pushed too far into the input tray when it is loaded, might feed into the printer incorrectly, causing the paper to tear. Paper stacks loaded into the input tray with too many or too few sheets of paper, might feed into the printer incorrectly, causing the paper to tear.
Linishers and bench-mounted grinders can produce noise levels of around 88-95dB(A) and hand held angle grinders (figure 2) can produce noise levels around 90-115dB(A). Below are examples of risk control measures you can use to control noise from grinders.
The noise you are describing could be the carriage sticking or a small piece of debris inside the unit. You could go thought each of these documents step by step to clean out your printer to see if it resolves the issue.

Relevant Questions and Answers :

the most relevant questions and answers related to your specific issue

HP Color Laserjet 3800 problem when printing color
ANSWER : Do a cold reset

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HP LaserJet 4P

HP LaserJet 2200D won't print configuration page
ANSWER : Find someone with a HP LaserJet 4100 and you can configure the card to the IP you want:

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HP LaserJet 4P

HP Laserjet 1320tn printing grey instead of black
ANSWER : Try this test. Put a page into the manual feeder and do that same test. When the end of the page is just about to enter the printer, open the lid. Take out the toner cartridge and pull back the shutter. Look at the image and see if it is black. The explanation is that there is high voltage going to both the toner cartridge and the charge transfer roller below it. If the image on the drum is black, then the fault is at the transfer roller not getting enough high voltage. The transfer roller pulls the image off of the drum and down onto the paper. It would not be a laser scanner problem as any issue with it would not result in an overall gray image, but combination of gray and black. It will probably turn out to be a bad HV power supply, which will need replacement. I’ve never seen this particular problem on this model.

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HP LaserJet 4P

HP 4000 Dupler Grinding Noise
ANSWER : More Information

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HP LaserJet 4P

How to copy a card slot in HP laserjet 4250N
ANSWER : None that I know of, using a computer is likely your best option but I never attempted it.

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HP LaserJet 4P

evenly spaced horizontal lines on hp laserjet III printout
ANSWER : The lines would be a toner cartridge problem. Which paper tray? The MF tray or the optional paper cassette?

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HP LaserJet 4P

Hp laserjet 2420dn
ANSWER : I would suspect the fixing film has wear. You can prove the theory by doing a half-stop test. This stops the print before it enters the fixing film assembly. Load paper in the drop down MF tray in the front. Send a print job and when the tail end starts to enter, open the cartridge lid on top to stop it. Then remove the toner cartridge and look at the paper. If you see the marks, it is from the toner cartridge. If you don’t, it would be coming from the fixing film since the paper hasn’t entered it.

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HP LaserJet 4P

HP Laserjet 4250 – RFU LOAD ERROR
ANSWER : Italiano:

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HP LaserJet 4P