C3-6140 error Color Laser MFP 178nw unresolved after change for a new image unit

[Lft1]

Hello I had a C3 6140 error on my printer. I bought a new HP image unit and changed it accordingly but it seems that the printer does not recognise that I have made the change.

I can't print and still have the C3 6140 error on the printer. I restarted my printer several times, clean it properly nothing help.

Is there any trick to reset the printer after having changed the image unit ?

Thank you for your help

[Anand_Andy]

Hi @Lft1,

Welcome to the HP Support Community

I'd like to help!

I understand you are getting an error on your Color Laser MFP 178nw printer. 

Kindly follow the below steps to resolve the issue:

Step 1: Perform a power reset on the printer.

1. Turn the printer on, if it is not already on.
2. Wait until the printer is idle and silent before you continue.
3. With the printer turned on, disconnect the power cord from the rear of the printer.
4. Unplug the power cord from the wall outlet.
5. Wait at least 60 seconds.
6. Plug the power cord back into the wall outlet.
      NOTE: HP Recommends connecting the printer power cord directly to the wall outlet
7. Reconnect the power cord to the rear of the printer.
8. Turn on the printer, if it does not automatically turn on.
9. Wait until the printer is idle and silent before you proceed.

Step 2: Check for packing materials and paper

Check the toner cartridge and printer for any packing materials and paper that might be causing the error message.

Turn off the printer.

Disconnect the power cord from the printer.

Figure: Disconnecting the power cord

Open the toner cartridge door.

Figure: Opening the toner cartridge door

Look for and remove any packing material such as cardboard, tape, or paper debris.

Figure: Example of removing packing material

Remove the toner cartridge.

Figure: Removing toner cartridge

Look for and remove any additional packing material or paper debris inside the toner cartridge area.

Check for and remove the orange tab on the toner cartridge.

Figure: Removing the orange tab

Check for and remove the protective sealing tape on the toner cartridge.

To remove the protective sealing tape, pull the tab away from the toner cartridge, and then discard.

Figure: Removing the protective sealing tape

Gently rock the toner cartridge from front to back to make sure the toner is distributed evenly.

Figure: Rocking the toner cartridge

Insert the toner cartridge into the printer, and then close the toner cartridge door.

Figure: Inserting the toner cartridge

Reconnect the power cord, and then turn on the printer.

If checking for and removing packing materials and paper did not resolve the issue, continue to the next step.

Step 2: Clean the electric contacts on the toner cartridge

The toner cartridge might have a faulty connection to the printer. Use a lint-free cloth to clean the toner cartridge contact (E-label).

Open the toner cartridge access door.

Remove the toner cartridge from its slot.

Use a lint-free cloth to wipe the toner cartridge contact (E-label) on the top left of the toner cartridge.

NOTE:

Coffee filters work well.

Figure : E-label on a toner cartridge

Insert the toner cartridge into its slot, and then close the toner cartridge access door.

If cleaning the E-label did not resolve the issue, continue to the next step.

You may also refer to this document link.

Hope this helps! Keep me posted. 

Please click “Accepted Solution” if you feel my post solved your issue, it will help others find the solution. Click the “Kudos/Thumbs Up" on the bottom right to say “Thanks” for helping!

[Anand_Andy]

Hi @Lft1,

Welcome to the HP Support Community

I'd like to help!

I understand you are getting an error on your Color Laser MFP 178nw printer. 

Kindly follow the below steps to resolve the issue:

Step 1: Perform a power reset on the printer.

1. Turn the printer on, if it is not already on.
2. Wait until the printer is idle and silent before you continue.
3. With the printer turned on, disconnect the power cord from the rear of the printer.
4. Unplug the power cord from the wall outlet.
5. Wait at least 60 seconds.
6. Plug the power cord back into the wall outlet.
      NOTE: HP Recommends connecting the printer power cord directly to the wall outlet
7. Reconnect the power cord to the rear of the printer.
8. Turn on the printer, if it does not automatically turn on.
9. Wait until the printer is idle and silent before you proceed.

Step 2: Check for packing materials and paper

Check the toner cartridge and printer for any packing materials and paper that might be causing the error message.

Turn off the printer.

Disconnect the power cord from the printer.

Figure: Disconnecting the power cord

Open the toner cartridge door.

Figure: Opening the toner cartridge door

Look for and remove any packing material such as cardboard, tape, or paper debris.

Figure: Example of removing packing material

Remove the toner cartridge.

Figure: Removing toner cartridge

Look for and remove any additional packing material or paper debris inside the toner cartridge area.

Check for and remove the orange tab on the toner cartridge.

Figure: Removing the orange tab

Check for and remove the protective sealing tape on the toner cartridge.

To remove the protective sealing tape, pull the tab away from the toner cartridge, and then discard.

Figure: Removing the protective sealing tape

Gently rock the toner cartridge from front to back to make sure the toner is distributed evenly.

Figure: Rocking the toner cartridge

Insert the toner cartridge into the printer, and then close the toner cartridge door.

Figure: Inserting the toner cartridge

Reconnect the power cord, and then turn on the printer.

If checking for and removing packing materials and paper did not resolve the issue, continue to the next step.

Step 3: Clean the electric contacts on the toner cartridge

The toner cartridge might have a faulty connection to the printer. Use a lint-free cloth to clean the toner cartridge contact (E-label).

Open the toner cartridge access door.

Remove the toner cartridge from its slot.

Use a lint-free cloth to wipe the toner cartridge contact (E-label) on the top left of the toner cartridge.

NOTE:

Coffee filters work well.

Figure : E-label on a toner cartridge

Insert the toner cartridge into its slot, and then close the toner cartridge access door.

If cleaning the E-label did not resolve the issue, continue to the next step.

You may also refer to this document link.

Hope this helps! Keep me posted. 

Please click “Accepted Solution” if you feel my post solved your issue, it will help others find the solution. Click the “Kudos/Thumbs Up" on the bottom right to say “Thanks” for helping!

[Lft1]

Thank you very much for helping, unfortunately the process did not change anything and I still have the same error message and cannot print.

any other possibility ?

Many Thanks

[Anand_Andy]

@Lft1,

Thank you for your efforts, I'm sending out a private message to assist you with the next course of action. Please check your Private message icon on the upper right corner of your HP Community profile Next, to your profile Name, you should see a little blue envelope, please click on it or simply click on this link.

Hope this helps! Keep me posted for further assistance.

Please click “Accept as Solution” if you feel my post solved your issue, it will help others find the solution. Click the “Kudos, Thumbs Up" on the bottom right to say “Thanks” for helping!