HP LaserJet 4350

How to Identify and Fix Common Problems ?

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If you find dots or spots appear on your printed documents this is usually caused by paper dust or objects such as staples or paper clips sticking to the surface of the drum. Toner builds up around these areas which in turn creates the dots or spots which then appear on your print-out.
Dots are typically caused by foreign material inside the machine (for example paper dust, glue from labels or envelopes, paper clips, staples) sticking to or damaging the surface of the drum. Toner builds up on or sticks to these areas on the drum and creates black dots on the printed pages.
A Bad Toner Cartridge

Usually associated with compatible or re-filled cartridges, a leaky cartridge deposits toner inside your printer and onto your paper in places that it`s not intended, resulting in black spots.

Usually a quick paper setting adjustment will clear up a ghosting issue right away. Run a cleaning – Most printers have a cleaning function built into the machine. Run this a couple of times to attempt to clear up the printing issue. Inspect the drum – Sometimes excess toner powder can stick to the drum.
Dots or marks on the printed pages may be caused by damage to the drum roller, or by toner or foreign material being stuck to the drum roller.
Fill the container halfway up with ink, then use a tiny spoon (like 1/8 teaspoon) to add gum arabic to the ink a little bit at a time. First, stir in one spoonful, then test the ink to see if it still bleeds. If it does, add another spoonful. Test again, and continue to add gum arabic until the ink no longer bleeds.
So you don`t have to get rid of them, although some people choose to for cosmetic reasons. Some dark spots, such as ones cause by acne, may fade on their own over time. Others can be faded or removed completes with topical treatments, but these may require several months of use.
Why is it important to clean a laser printer? Printing is vital to all businesses so ensuring your laser printer is thoroughly cleaned is crucial as it allows your machine to continue working efficiently. Cleaning a laser printer is easy with the correct equipment, however they are prone to dust and debris.
Ghost prints happen when the drum or fuser unit within your printer become faulty. Because a fault with this element won`t heat the particles of the toner to a high enough temperature, the marks being made on the paper are much lighter in colour and appear more faded than typical documents.
Dirty printheads

Dirty nozzles, leftover toner, debris, or dust can interfere with your printer and cause ghosting. Run the printer`s built-in cleaning function multiple times, and print a test page between each. Repeat this process until the ghosting issue disappears.

Ghost prints happen when the drum or fuser unit within your printer become faulty. Because a fault with this element won`t heat the particles of the toner to a high enough temperature, the marks being made on the paper are much lighter in colour and appear more faded than typical documents.
The printer could be dirty. Solution: Arrange to have your printer cleaned. The toner cartridge may be nearly empty. Solution: Replace the toner cartridge.

Relevant Questions and Answers :

the most relevant questions and answers related to your specific issue

HP LJ 4350 – Tray 2 not lifting, no motors turn.
ANSWER : I can’t believe, pieces of paper was under the registration flap, now my 4250N is working.

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HP LaserJet 4350

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 4350

HP Laserjet 4200 50.2 Fuser error
ANSWER : if you are using a good fuser the next part to try would be low voltage power supply

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HP LaserJet 4350

HP Laserjet 4250 – RFU LOAD ERROR
ANSWER : Italiano:

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HP LaserJet 4350

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 4350

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 4350

HP laser jet 3015 "Upgrade Error Call HP Support"
ANSWER : rgtr

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HP LaserJet 4350

HP Laserjet M3035xs RFU Upgrade
ANSWER : There’s no way.

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HP LaserJet 4350