Question about HP Black Toner for LJ4L & 4P

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HP LJ 4L paper jam light flashes indicating a peper jam after printer makes a grinding noise. What can be the problem?

I removed the cover and noticed that one of the gears seems to have slightly worn out teeth, but I did not notice any paper jam. I could not turn the toner cartridge roller.

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  • Rocco Polifroni Nov 05, 2012

    Unfortunately, it did not help! I looked very attentively but could not find any bits of paper stuck anywhere in the paper path. I think that the printer indicated a paper jam because it did not sense any paper reaching the 'paper present' sensor due to either a worn out wheel gear or the toner roller malfunctioning 'stuck, that is'. I will perhaps buy a refurbished toner and test the printer. Thanks anyway. Rocco

  • Tom Chichester Nov 05, 2012

    I found when I had to overhaul my LJ4 that I could not get the parts from HP anymore. So far, my LJ 1012 has been a big improvement!

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You may be right about the worn gear as a factor but I used to have a LJ 4 and whenever it indicated a paper jam it was always right. In some cases, the jam was a tiny scrap of paper deep inside. It took a flashlight and examination of every bit of the paper path to find it

Posted on Nov 03, 2012

  • Rocco Polifroni Nov 05, 2012

    Unfortunately, it did not help! I looked very attentively but could not find any bits of paper stuck anywhere in the paper path. I think that the printer indicated a paper jam because it did not sense any paper reaching the 'paper present' sensor due to either a worn out wheel gear or the toner roller malfunctioning 'stuck, that is'. I will perhaps buy a refurbished toner and test the printer. Thanks anyway. Rocco

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