HP CopyJet M

How to Identify and Fix Common Problems ?

Our sources include academic articles, blog posts, and personal essays from experienced technical support :

Inkjet printers: Press the Start Copy Color or Start Copy Black button to start a copy job. If you need more than one copy, press the button quickly for as many copies as you need. The copy job starts after the last button press.
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.
For instance, the HP ENVY series allows you to print in single-cartridge mode. When it comes to printing a single color i.e black, you can perform your printing activity by simply removing the tricolor cartridge and letting your printer default settings to use only black ink.
Black Print Mode allows you to print only with black ink as a temporary emergency measure to minimise the down time in the event any colour inks are expended, even if there is no replacement cartridges available.
Check the ink levels

Sometimes, the printer may not print black ink because it is low or empty. You can check the ink levels on the printer`s display, or by using the software that came with your printer. If the ink level is low, replace the cartridge or refill it according to the manufacturer`s instructions.

In four-color press printing, black is achieved by mixing cyan, magenta and yellow and then adding black ink on top of that. The result is a rich, deep black color. If you don`t have your image colors set correctly, though, the black can appear gray or washed out.
Streaks happen not from dust on the larger glass scanning surface, but on the smaller scanner that reads your documents as they are fed into the copier. When dust gets on the thin slit of glass that scans copies as your original document slides through, a single dust particle can cause a huge line streak.
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.
If you notice white or dark lines in your prints (also called banding), try these solutions before you reprint: Run a nozzle check to see if any of the print head nozzles are clogged. Then clean the print head, if necessary. Make sure the paper type setting matches the type of paper you loaded.
As long as your printer also has a colour cartridge, all the colours from the colour cartridge will print together to make … BLACK.
Printers that use two cartridges (one black, one tri-color) can print if one cartridge is empty. To continue printing, remove the empty cartridge from the printer. If a Single-cartridge mode message displays, select OK. If you are using the black cartridge, prints are in black and white (grayscale).
The answer is yes, your printer uses a bit of all colors (black, cyan, magenta, yellow) every time it prints. According to HP Support, “[our] printers are designed in such a way that it also uses color inks while printing in black to form a perfect black.
Hit the print button and scroll to `Printer Properties`. There will be an option labeled `Color` that gives you a choice between color and grayscale. You`ll want to select `Grayscale`. This indicates to the printer the document will be printed in black and white but still use different tones.
Printers that use two cartridges (one black, one tri-color) can print if one cartridge is empty. To continue printing, remove the empty cartridge from the printer. If a Single-cartridge mode message displays, select OK. If you are using the black cartridge, prints are in black and white (grayscale).
Set Default to Black and White

Right-click on the printer and click Printer properties. In the printer properties window, go to General tab and click Preferences button. In the Printing Preferences window, go to Paper/Output tab. Select Black and White.

Relevant Questions and Answers :

the most relevant questions and answers related to your specific issue

What repair needs to be done for a "50 needs repair" message on an HP Laserjet IIIP?
ANSWER : I don’t know what you mean by good toner cartridges. They haven’t been built in about 10 years, so if they are new OEMs in the box, they are guaranteed to fail. The 50 error on that printer is mostly a burned out fuser lamp. This site was sold, so as you can see, there are no more kits available.

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HP CopyJet M

HP Laserjet 1320tn printing grey instead of black
ANSWER : Try this test. Put a page into the manual feeder and do that same test. When the end of the page is just about to enter the printer, open the lid. Take out the toner cartridge and pull back the shutter. Look at the image and see if it is black. The explanation is that there is high voltage going to both the toner cartridge and the charge transfer roller below it. If the image on the drum is black, then the fault is at the transfer roller not getting enough high voltage. The transfer roller pulls the image off of the drum and down onto the paper. It would not be a laser scanner problem as any issue with it would not result in an overall gray image, but combination of gray and black. It will probably turn out to be a bad HV power supply, which will need replacement. I’ve never seen this particular problem on this model.

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HP CopyJet M

My 2550n Color LaserJet does not want to print in color
ANSWER : That model had issues with the carousel solenoid sticking. That might explain why it works after you let it sit for 10 minutes. The solenoid gets hotter with use which causes the deteriorated foam on it to become sticky and hold down the release plate instead of letting it go. This allows the carousel to spin when it is supposed to stop for each color. The solenoid is located on the right side of the printer. If you open the lid, it is just behind the opening at the top right. You need to remove the top of the printer and scrape off the goo on top of the solenoid body. I put a piece of thin sticky backed felt to replace it. Other people use electrical tape.

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HP CopyJet M

Black line printing in the middle of the page from top to bottom
ANSWER : Take out the toner cartridge and look at the drum. If you see the line, replace the cartridge. If you don’t, then you need to replace the fuser assembly.

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HP CopyJet M

Print file sent but no printing occurs
ANSWER : Been working on these since they first were released. Never seen a problem like yours. If it happens again, try doing an engine test, as it bypasses the formatter board. The engine test is located at the right side of the manual tray opening. Look for a hole in the side wall. Stick something like a paper clip into it to actuate the test button. It will then print a lined test page. If it does that, then it points to the formatter board as the cause of your problem.

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HP CopyJet M

Laserjet 4250 print quality issue (see image)
ANSWER : It looks like a fuser problem. One way to prove it is with the half-stop test. Put a sheet in the drop down manual feed tray. Send a print job and watch the paper. When the end of it is about to enter the printer, open the lid and take out the toner cartridge. Look at the printed image. If it looks OK, then it is a fuser problem. If not, then it is a toner cartridge issue since it hasn’t gone through the fuser.

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HP CopyJet M

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 CopyJet M

HP LaserJet 2200D won't print configuration page
ANSWER : Find someone with a HP LaserJet 4100 and you can configure the card to the IP you want:

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HP CopyJet M