HP LaserJet 4

How to Identify and Fix Common Problems ?

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Dust, paper fiber, and other debris might accumulate on the paper feed rollers and cause paper jams and paper feed issues. Clean the rollers inside the printer, and then try to print again.
If the paper is even slightly askew, the rollers will pick it up a little crooked, and — guess what — the crooked sheet will immediately get jammed. So even though there`s no paper stuck when you start printing, the loose paper guides are ensuring that a sheet gets jammed whenever the printer starts doing its thing.
Dirty printer rollers. If your paper jams are happening randomly and you can`t identify the cause, it could be that your printer rollers are dirty. Over time, dust and debris can build up on the rollers and cause the rollers to grab onto paper unevenly, which can lead to paper jams.
Dust, dirt, or debris: Not cleaning the HP Printer can also result in a paper jam error. So, if you find that no paper is stuck but a paper jam error showing, you must check for the dirt or dust on the device.
A piece of paper stuck in the paper tray or inside the printer can create a paper jam. Paper jams can occur for a variety of reasons, such as overloading the paper tray, loading different thicknesses of paper in the tray, or using paper that isn`t appropriate for your particular printer.
If your printer won`t print, a print job has stopped unexpectedly, or you received a “carriage jam” error, your printer carriage is likely jammed. These jams occur when the carriage holding the ink cartridges stalls in the printer. Carriage jams sometimes occur after a paper jam.
If your printer has a paper path cover behind the carriage, remove the cover, and then remove any jammed paper. Pull out the input tray, and then remove any jammed paper. If your printer has a bottom cleanout door, carefully lift the printer and look under it, and then remove any jammed paper from the bottom cleanout.

Relevant Questions and Answers :

the most relevant questions and answers related to your specific issue

hp 8600 pro when power on, paper jam message appear but there is no paper jam in the tray
ANSWER : Hp 8180 Photosmart All In One code keeps says paper jam and carriage jam when neither are jammed. I followed all the recommended things to do. I live in Raleigh NC any place to take this or any suggestion.

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HP LaserJet 4

Paper jam in tray 2 (but no paper pulled from tray) also M476DN models
ANSWER : Isopropyl alcohol is not recommended for rubber rollers. It dries out the rubber and hasten it’s cracking and breaking. It will do nothing to restore the grip. Those rollers are really hard to replace. It would be easy if that dumbass secondary menu really worked. None of the techs I’ve spoke to ever got into it. Everyone I know sends a print job and listens for the roller to rotate into position where you can pull it off.

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HP LaserJet 4

Optional 250 Sheet Feeder Tray (Q5931A – Tray 3) Constantly "Jams"
ANSWER : You don’t say if the paper moves at all. That’s key in determining the cause. If it’s not moving, then try swapping the rollers with tray 2. If it is moving out of the tray, then that would indicate there is some obstruction it is hitting on its way out of the tray. Hard to troubleshoot remotely when one doesn’t have specific details since we can’t see what is occurring.

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HP LaserJet 4

HP Laser Jet 4250 13.01.00 Jam in Tray 2
ANSWER : did you check if there’s multiple feeding while pulling papers

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HP LaserJet 4

Paper Jam and carriage jam code when nothing is jammed
ANSWER : Did you try cleaning the encoder strip that runs through the cartridge assy.? Use Window Cleaner on a paper towel. Also, check inside on the right. I’ve seen a lot of times where there is a folded up scrap of paper that stops the carriage from going all the way to the right.

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HP LaserJet 4

HP ScanJet 9000 service manual required
ANSWER : Scanner write some numbers, How i can know that number’s mean?

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HP LaserJet 4

I just bought an officejet 3830 2 weeks ago. Now it won't print at all! Says inkjet jam. It's not! I've done all the fixes as per hp's website now what?
ANSWER : Take it back and exchange it under warranty.

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HP LaserJet 4

paper jam
ANSWER : If you remove the fuser (2 screws), look to the left and you’ll see a gear on a metal bracket. That’s the coupling gear. It drives the fuser. You’ll see that it is yellow with teeth missing. You’ll need to replace it. You have to take the formatter assy. to the left of it off, and then there are a few screws holding it in place.

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HP LaserJet 4