I have a HP laserjet 4250tn. the printer was is making squeaking noises when it prints. somebody gave me the idea to chnage the cartridge but i do not know how to do so. may I have some assistance?
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These are not the quietist printer I have dealt with. Most of the squeeking noises we have encountered in servicing are related to the drums in the cartridges. Are these original cartridges or refills? If original and units are still under warranty, I would go after HP to deal with the noise. If you are using refilled or remanufactured cartridges, some noise is just part of the money saving tradeoff you make.
If you are printing invoices from the MP tray the pickup roller might be squeaking against the separation pad (common with this design). Other common squeak is toner cartridge noise.
The problem is the toner cartridge. Try to replace new cartridge. The toner cartridge is damage. If you are refilling the toner cartridge, you didn't return the part correctly especially the roller drum it not correctly place making him print out prints all black page.
Two things that can cause print quality issues and noise.
1. The toner cartridge can cause lines and sometimes can make a squeaking noise.
2. The fuser can cause streaking and smudges on the prints and can cause a grinding noise if the drive gear is worn or the bushings are worn.
1. Your cartridge
2. Your rollers that pull the paper through the machine
3. Fuser
If it is the cartridge, try changing it to see if it makes a difference. If it doesn't and the problem is with your fuser or rollers, you could be due for a maintenance cleaning and a certified technician can help rid you of the squeak.
In 90% of cases, the squeak is generated from the toner cartridge. Try changing the cartridge. If that does not work, it will possibly be coming from the fuser area at the rear of the printer or the exit rollers where the paper comes out.
If you hear the noise when you power up when just the transport is running, you may need a new fuser. If the noise only comes during printing after the transport starts it could be a bad laser unit. The levels should not be changed by removing the cartridges.
You either have a bad spot on the drum or a bad spot on the fuser rollers. Replace the cartridge first. If spot continues, take cartridge out and get inside with a flashlight. You'll probably find a piece of paper stuck to a roller.
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