Question about Epson Stylus CX7800 All-In-One InkJet Printer

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BLUE PRINT NOZZLE IS SUB=PAR

I ran the self-test and clean, and it still comes out low on the blue side. I ran the clean 5 times, and changed the cartridge, and it is still not up to snuff. Does this just denote a bum nozzle, and I should have the whole thing replaced?

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If you have changed the cartridge and run a number of cleaning cycles with little or not change, then I am afraid that replacement would be your best option if you are out of warranty - sorry

Posted on Sep 09, 2007

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Hi, (MX850) My blue ink has stopped printing. I




Performing Maintenance:




Note :
Be sure to install the ink tanks in the correct order indicated by the label on the Print Head Holder. The machine will not print if an ink tank is installed in the incorrect position.
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1. Please open the "Solution center" again and go to the "Maintenance" Tab.
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3. Get a damp paper towel.
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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."
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Next, try this printer self-test by following the steps given below:
1. Power the printer off.
2. Press and hold the "Paper Feed" button.
3. While still holding the "Paper Feed" button, press and release the "Power" button. Continue holding the "Paper Feed" button.
4. When the printer starts pulling paper, release the "Paper Feed" button. It should print a test page at this point.
5. Power the printer off, as this test is continuous.

The self-test should at least print out a set of either a solid black or solid color bars, if not both (if you have a printer with both color and black installed simultaneously). Should this test fail, please try it again without cartridges installed. If the self-test still fails to take paper in and make sounds like the carrier is moving across the paper, this is a hardware issue, and the printer will require service. If the self-test completes without any cartridges installed, run the self-test again with only a color cartridge installed (If you have both black and color cartridges, after this test, run the test again with just the black cartridge installed). If you find that either cartridge causes the self-test to fail, please let us know.

If the self-test prints, but has lines or smudges or other print quality issues, please let us know.

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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 "All 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.
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1. Turn the power to the printer "off."
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