Blinking light The error light (I think that's the label on it) blinks recently but the printer still is printing

First you need to check the blink rate:
If fast this denotes a ribbon error - check ribbon is installed correctly.
If slow this denotes a label sense error - check the sensors are clean and are correctly aligned.

I am getting an error and the printer will not print. The color ink lights are blinking but it is still half full.

Label definition in printer driver may need adjustment. Try calibrating printer, printer on solid green light, hold down feed key & release after light blinks 4 times, (blinks once, twice, three times then 4 times) Download the Zebra setup utility and use it to configure printer.

Resolving a blinking light When an error occurs, the power light will blink continuously and an error message will appear on the computer screen. Read the onscreen error message explaining the problem and follow its solution. If no error message appears, go to the Maintenance section in the Printer Assistant and click any of the four main buttons. This will prompt the software to check the status of the printer and the error message should then appear. The following table lists possible causes and what to do to correct the problem. Symptom Possible cause What to do to correct the problem Power light is blinking Printer cover is open Close the cover. Printer is out of paper Insert appropriate media in the In tray. Printer has difficulty picking up label media

• Change the printers print mode setting.
• Change the printer's paper type selection.
• Use a different brand of label media.

There is a paper jam Follow each of these steps until the problem is resolved:

1. Remove the paper from both paper trays.
2. Press the Power button once. Wait a moment for the paper jam to clear.
3. If printing labels, verify that a label did not become detached while passing through the printer. If the paper jam was not resolved, continue on to the next steps.
4. Remove the rear access door.
5. Remove the paper jam through the opening at the back of the printer.
6. Replace the rear access door.
7. Reload the paper into the paper In tray.
8. Print the document.

There is a problem with a print cartridge Follow each of these steps until the problem is resolved:

1. Remove and then reinsert the print cartridge(s) into the printer.
2. Clean the print cartridges automatically using the Clean Cartridges option in the Printer Assistant.
3. Manually clean the print cartridges and print cartridge cradles:
   • Open the printer cover and wait until the carriage moves to the center.
   • Press the Power button to turn off the printer.
   • Disconnect power cord from the back of the printer.
   • Remove the print cartridges and place them on a piece of paper with the nozzle plate facing up.
   • Lightly moisten a cotton swab with distilled water.
   • Clean the face and edges of the print cartridges with the swab. Do not touch the print cartridge ink nozzles or copper contacts.
   • Wipe the underside of the print cartridge cradle walls using a clean, moistened swab.
   • Reinsert the print cartridges.
   • Close the printer cover.
   • Connect the power cord to the back of the printer.
   • Press the Power button to turn on the printer.
4. Calibrate the print cartridges.
5. If the light is still flashing, replace the print cartridges.

Power light is blinking and/or there are missing lines or banding issues on the printout The print cartridge has partial loss of electrical interface with the carriage connections

1. Print a printer self-test by holding the power button down with a pencil and opening and closing the top cover four times.
2. Check the nozzle self-test pattern in the self-test print out. If one or more of the solid rectangular areas are missing, an electrical contact problem may be present.
3. Remove and then reinsert the print cartridge(s) into the printer.
4. Print the document.
5. If the problem persists, follow the steps listed above for cleaning the print cartridges and print cartridge cradle.
6. Try printing again. If the problem continues, replace the print cartridges.

I have a LabelWriter 4XL with legit labels and driver on Mac. I had a flashing blue light. I had tried cleaning, cycling power, reseating the interface connection and it seemed none of this helped. Then I removed the labels from the feed and re-fed them and the error cleared.

Imaging drum is empty or missing (Error 40204) Light pattern Description The imaging drum is empty or missing. The imaging drum light is blinking, and then printer stops printing. An error 40204 is written to the event log. The printer cannot detect the imaging drum correctly. Action

1. Reinsert or replace the imaging drum.
2. If the imaging drum light is still blinking but the Attention light is not on, turn the printer off, and then back on.
3. Repeat Steps 1 and 2 with a new imaging drum.
4. If the problem continues, contact HP Customer Care at http://www.hp.com/support/clj2550 or see the flyer that came in the printer box for other contact information.

Imaging drum e-label reader is faulty (Error 10004) Light pattern Description The imaging drum light is blinking, and then printer stops printing. An error 10004 is written to the event log. The imaging drum e-label reader is faulty and the printer cannot detect the imaging drum correctly. Action

1. Reinsert or replace the imaging drum.
2. If the imaging drum light is still blinking but the Attention light is not on, turn the printer off, and then back on.
3. Repeat Steps 1 and 2 with a new imaging drum.
4. If the problem continues, contact HP Customer Care at http://www.hp.com/support/clj2550 or see the flyer that came in the printer box for other contact information.

You should try a factory reset. Power off the printer. Hold the "pause" and "feed" buttons down while powering up. Allthe lights will blink and when they stop blinking, release the "pause" and "feed" buttons. This will factory reset the printer.

Introduction The printer lights indicate the printer status. These lights can be on, off, or blinking (flashing), depending on the status of the printer. The sections below describe the most common combinations of blinking lights, how to fix the issue, and how the issue is caused. NOTE: The light patterns included in this document are described as blinking or flashing lights. For the purpose of this document, "flashing" means the same as "blinking." Blinking lights Printer lights can can blink for more than one reason, so the solution can vary. These solutions need not be performed in a specific order, but solutions for the most common issues are presented first. Blinking lights are often accompanied by an error message on the computer screen, which might help determine the solution. Issue: Power light is blinking

Solution

Close the cover.

Cause

Printer cover is open. Solution

Insert appropriate media in the In tray.

Cause

The printer is out of paper. Solution

• Change the printer's print mode setting.
• Change the printer's paper type selection.
• Use a different brand of label media.

Cause

The printer has difficulty picking up label media. Solution

Follow each of these steps until the problem is resolved:

1. Remove the paper from both paper trays.
2. Press the power button once. Wait a moment for the paper jam to clear.
3. If printing labels, verify that a label did not become detached while passing through the printer. If the paper jam was not resolved, continue on to the next steps.
4. Remove the rear access door.
5. Remove the paper jam through the opening at the back of the printer.
6. Replace the rear access door.
7. Reload the paper into the paper In tray.
8. Print the document.

Cause

There is a paper jam. Solution

Follow each of these steps until the problem is resolved:

1. Remove and then reinsert the print cartridge(s) into the printer.
2. Clean the print cartridges automatically using the Clean Cartridges option in the Printer Assistant.
3. Manually clean the print cartridges and print cartridge cradles:
   • Open the printer cover and wait until the carriage moves to the center.
   • Press the Power button to turn off the printer.
   • Disconnect power cord from the back of the printer.
   • Remove the print cartridges and place them on a piece of paper with the nozzle plate facing up.
   • Lightly moisten a cotton swab with distilled water.
   • Clean the face and edges of the print cartridges with the swab. Do not touch the print cartridge ink nozzles or copper contacts.
   • Wipe the underside of the print cartridge cradle walls using a clean, moistened swab.
   • Reinsert the print cartridges.
   • Close the printer cover.
   • Connect the power cord to the back of the printer.
   • Press the Power button to turn on the printer.
4. Calibrate the print cartridges.
5. If the light is still flashing, replace the print cartridges.

Cause

There is a problem with a print cartridge. Solution

1. Print a printer self-test by holding the power button down with a pencil and opening and closing the top cover four times.
2. Check the nozzle self-test pattern in the self-test print out. If one or more of the solid rectangular areas are missing, an electrical contact problem may be present.
3. Remove and then reinsert the print cartridge(s) into the printer.
4. Print the document.
5. If the problem persists, follow the steps listed above for cleaning the print cartridges and print cartridge cradle.
6. Try printing again. If the problem continues, replace the print cartridges.

Cause

The print cartridge has partial loss of electrical interface with the carriage connections.

The yellow-print-cartridge
light is blinking, and the
printer stops printing.

The print cartridge is
empty or missing.

The printer cannot
detect the print
cartridge correctly.
1. Reinsert or replace the print cartridge.
2. If the print-cartridge light is still blinking but the
Attention light is not on, turn the printer off and
then back on.
3. If the problem persists, repeat the above steps
with yellow print cartridges until the error is
resolved.
4. If the problem persists, replace the printcartridge
E-label reader, which is located on the
pressure assembly of the print-cartridge
carousel.

1: Is it a TLP2844 or a TLP2844Z.

Operationally they are completely different printers. TLP2844 uses ELP (Eltron Programming Language. but TLP2844Z uses ZPL (Zebra Programming Language). You need to calibrate the printer to the labels.

Calibration:
If its a TLP2844. Load media. Connect power.
Hold down feed key, power on, count one, two, release feed key. The printer will go through a calibtation routine and print config label. IMPORTANT - When it prints this label you must press the feed key and see the message OUT OF DUMP. Your printer will now be calibrated. Check this by hitting the feed key a few times and printer will feed one label each time feed is hit.

Calibration:
If its a TLP2844z.

Load media. Turn printer on and wait for green light (Approx 1 minute)
Press feed key and keep it pressed until green light blinks once, then twice, now release feed key.