MP870 won't copy.

A technique to improve print quality is to try and clean the cartridge nozzles. You may clean the cartridge by following the steps given below:
1. Go to the "Lexmark solution center." This can be done by clicking on "Start," go to "Programs" and Lexmark printer group. Click on the "Lexmark Solution center." Next click on the "Maintenance" Tab.
2. Select "Clean and Fix Horizontal streaks." Click on "Print". This will produce a printed page.
The colors that you should see here are black, yellow, magenta (a reddish purple) and cyan (a dark sky blue). You should notice the diagonal lines above and below the solid horizontal lines. These diagonal lines should be solid from left to right with no gaps.
If there are gaps in the lines or the print diminishes across the page, you should run the "Clean Print Nozzle" page a couple more times to try and clear it up. If you still have gaps at the top and bottom, you should "wick" the cartridges by following the steps given below:
1. Please open the "Solution center" again and go to the "Maintenance" Tab.
2. Select "Install color/black cartridge" and remove the cartridge or cartridges from the printer.
3. Get a damp paper towel.
4. Set the ink cartridge right side up on the damp paper towel so that the ink nozzles are against the towel and hold the cartridge in this position for about 15 seconds.
5. Now wipe the print head (on the bottom where the ink comes out) across in one direction only (left to right) until it looks clean.
6. Next dab the cartridge on the towel to make sure that the ink is flowing.
7. Snap the cartridges back into the printer.
8. On your computer, select "Old Cartridge install."
9. Repeat the "Clean Nozzle Page" one more time. If this fails to address the problem the entire procedure may need repeating.

Good Luck!!!!

Symptom: Black or Blank image while copying or scanning.
Part suspect rating: Scan head..70%
Scan head cable...25%
Formatter...5%
For tech guys only: Remove ADF unit from the printer, remove both side covers of adf, remove & replace scan head, check...
Replace scan head

Yes. The drum is most likely your problem. It is possible that it is a one time problem, which can occur if you print a very dark black page or image followed by a light gray page or image. If it has only happened once or twice try printing a different document to check it. If it is happening repeatedly, then you should replace the drum and instantly see it fixed. You can get a drum anywhere that supplies toner.

I hope this helps! Good luck!

If the faint output is in black color you need to change black developer in Imaging unit.

please check whether the data cable rx232 which is used to connect the printer to pc is fine. try someone else's cable(e.g friend) and check whether it is able to print .re install the software that is provided along with the printer in the form og cd or dvd. hope your problem will be tackled then

There are small mirrors on the copy lamp, wipe with a clean dry soft cloth. Remove the drum unit and wipe upper part where the drum unit was and make sure the area is clean.

Hi,

You can easily fix this yourself, one of the quickest ways to fix it is to print 10 doublesided blank pages and it will clean the inside of the machine for you and the line will vanish.

For further print quality problems on this machine follow these instructions to troubleshoot.

When troubleshooting image quality problems, it is important to understand the situations in which the problem occurs.

Print a copy of the color test pages to determine whether the problem is in one color or more than one color.

1. Press the [Up] or [Down] arrow button on the Control Panel to select [Troubleshooting] on the Display Screen, and then press the [OK] button.
2. Press the [Up] or [Down] arrow button to select [Print Quality Problems], and then press the [OK] button.
3. Press the [Up] or [Down] arrow button to select [Color Test Pages], and then press the [OK] button to print the test pages. If the problem occurs with one color on the test pages, perform the solutions for this problem. If the problem occurs in more than one color on the test pages, restart your search and select a case for the image quality problem occurring through all colors.

i think the inside printer have dirt or obstacles that blocken the cartridges while printing.
try to clean manually the printer by using powerful air blower,repeatedly.

check the "photoconductor unit" (pg 37 in the Maintance manual)

ours was doing it with the magenta and saw a faint 'scratch' on the roller. will attempt to replace and report back if this fixes it.

Toner issue getting to drum - use gen toner cart.

or Drum blade stuffed (lines are down page fro top to bottom- replace drum assy

Drum has been exposed to light faint or blank across copies repeated 4 times down page - replace drum assy

or upper fuser roller stuffed, down page, smudgy print -  replace fuser

LSU(laser) or boards rarely cause issues