HP LaserJet IIIP+

How to Identify and Fix Common Problems ?

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Vertical lines in prints are an early warning sign of a low ink cartridge, which may show up before the printer`s low ink alerts start. You can fix the problem by replacing the low cartridge. Gently shaking the drained cartridge a bit may help to get another few prints out of it without vertical lines.
When your printer leaves black lines, the lines indicate that there are excess toner powders on the rollers or transfer belt within the printer. As the paper is moved along by the rollers and transfer belt, any excess powder left on them can result in lines being left on the paper.
The streaks or lines might be caused due to low ink levels in one or both ink cartridges. Check the ink levels using the HP Toolbox to determine if the ink cartridges are low on ink and need to be replaced. note: Ink level warnings and indicators provide estimates for planning purposes only.
HP has determined that 99% of all lines and streaks on copies made by feeding the original documents through the ADF are caused by debris on the ADF glass. Debris can include dust, paper or toner dust, residue from sticky note adhesive, correction fluid or tape, ink, fingerprints, and more.
Generally speaking, a visible vertical line down your page after printing is an indication that the image drum in the machine may be damaged. It could also mean that the machine is reaching the end of its life.
A printer printing lines on the page are normally caused by a blocked, dirty, or damaged print head. Blocked ink cartridge nozzles, or not removing protective seals correctly when you installed a new ink cartridge can also cause missing lines of print.
Vertical Streaks or Lines

Swapping out the cartridge for another should help you rule it out as the culprit. Vertical white lines also can signal an obstruction that prevents the laser from imaging pages correctly. Resolving that problem can require cleaning elements of the laser assembly or replacing it altogether.

Streaking is usually caused by a worn out drum unit or spent toner cartridge. Drum units are a consumable and only need to be replaced after the use of 3 or 4 toners. Not all printers use a separate toner and drum unit.
The appearance of horizontal or vertical lines and wrinkles is due to various factors, among them genetics (loss of elasticity and firmness, slower cell renewal rate), hormone changes, sun exposure, smoking, pollution, stress and, of course, repeated facial expressions.
| – bar: The vertical bar is used in mathematics as a sign of absolute value, in prosodical studies to mark a caesura, and in propositional calculus (where it is called Sheffer`s stroke) as a sign of nonconjunction.
HP has determined that 99% of all lines and streaks on copies made by feeding the original documents through the ADF are caused by debris on the ADF glass. Debris can include dust, paper or toner dust, residue from sticky note adhesive, correction fluid or tape, ink, fingerprints, and more.
Generally speaking, a visible vertical line down your page after printing is an indication that the image drum in the machine may be damaged. It could also mean that the machine is reaching the end of its life.
In HP Solution Center, click Settings, click Print Settings, and then click Printer Toolbox. The Printer Toolbox opens. Click Align the Print Cartridges. Click Align, and then follow the on-screen instructions.

Relevant Questions and Answers :

the most relevant questions and answers related to your specific issue

diagonal stripe pattern
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HP LaserJet IIIP+

Old printer cable
ANSWER : The do sell adapter cables at Fry’s Electronics. You can search their site if you don’t have a store near you.

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HP LaserJet IIIP+

vertical lines
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HP LaserJet IIIP+

Vertical lines on paper
ANSWER : You can use Isopropyl Alchol. I would wait until it cooled down first.

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HP LaserJet IIIP+

vertical lines in the print
ANSWER : Looks like a bad wiper blade in the toner cartridge. They are rubber and with age. Their function is to clean off residue toner on the drum, similar to a windshield wiper blade cleaning off rain drops.

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HP LaserJet IIIP+

Darker (not black) vertical band about 3/8" wide 3 1/2" from left edge only on odd sheets and only in duplex mode
ANSWER : If you are using letter sized paper, then this is a horizontal band since the paper feeds in landscape mode. Either way it is a really odd problem. There is no way it could be either the fuser or the toner as both of those would consistently do the problem, not intermittently. Also, does the band go all the way across the page or does it have borders on either end.

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HP LaserJet IIIP+

Expired Ink Cartridges – Any way to move paper with old cartridges?
ANSWER : You could try disconnecting the printer from the computer. Then change the date on the panel to prior to the expiration date. That should fool it.

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HP LaserJet IIIP+

HP CM2320fxi MFP random color stripes
ANSWER : Had this problem with an HP Color LaserJet 3700dn unit not too long ago. In fact, it was not only doing the random multicolored stripes/bands across the page thing, it was also doing a repetitive palm print-like smudge of black toner on every page. I didn’t want to give up on this printer because on the few occasions in which it printed perfectly, the image quality was stunning and the colors were very impressive.

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HP LaserJet IIIP+