Loop in printer HP SMART TANK 7600 series

[Mirco45]

I have changed a bottle of ink in my printer HP SMART TANK 7600  but after having closed the cover the printer continue to display : check of ink levels . I have tried usual tricks ad detaching it from the power without success

[BeemerBiker]

Possibly the PC either has or simply gets old information from the printer when you check the ink levels.

1. Unplug printer from the wall outlet.
2. If the power cord has a transformer (wall wart) unplug from the printer also.
3. Press the power button 2-3 times to discharge residual electricity.
4. Wait 60 second then plug back in and turn on.
5. Reboot your PC.

Another possibility is the electrical contacts on the cartridge (or the printhead) have ink debris, or tape / glue residue.
Expand the Spoiler for cleaning advice

Spoiler

General advice on printhead cleaning is here.
This link shows cleaning the 8600 printhead and removal is shown here. This video for 86xx is good

This is another type of printhead cleaning, different from the above.

Cleaning and removing ink is shown below by our "Scullery" team.

An HP original video on how to clean the printheads by our experts. Yes, this can get messy, but it works. If your ink levels are good but you are printing blank pages then this is likely the solution.

Official HP advice on cleaning.

Some printers have a printhead cleaning procedure.

To clean the printhead on an HP printer, access the printer settings through the HP App, navigate to "Print Quality Tools," and select "Clean Printhead"; this will initiate a cleaning cycle where the printer will automatically run a cleaning process to clear any clogs in the printhead

Inkjet and printhead cleaning kits are available

Consumer inkjet printer printheads typically last for several years, with some lasting up to 10 years or even longer. However, the lifespan can vary greatly depending on usage, maintenance, and environmental factors.

How many total impressions (pages) have you done?

If you have a tank type printer there could be air in the lines.
Expand the spoiler for advice

Spoiler

To prevent bubbles from forming in the ink tubes, keep the ink levels above the minimum line, refill the tanks before they run too low, make sure the tank caps are closed securely, and avoid tilting or transporting the printer unnecessarily.

If you have bubbles

HP's SupportGPT recommends using HP Smart (or the HP App) to run HP's clean printhead function that many of our inkjet or tank printers have.

Google's AI provides a fallback in the event the maintenance cycle fails

• Turn off the printer: Power off the machine and safely open the access doors to expose the ink tanks and printhead carriage.
• Locate the air bubble: Visually identify where the air bubble is trapped in the translucent ink pipe.
• Manually push the air: You can often gently tap along the ink tubes to help the air bubble travel up into the main ink tank reservoir.
• Use a syringe (for stubborn clogs): If tapping fails, you can use an ink refilling syringe (often found in printer cleaning kits). Remove the ink cartridge or damper inside the printhead, attach the syringe to the ink outlet, and gently pull back on the plunger until ink flows smoothly and the air is drawn out.

Let me know what you find out.

[Mirco45]

I have done what suggested but without results.  Now I ve the printer screen blocked by the following message.

The print carriage is stuck. Check that the paper is not jammed and that the ink cartridge latch is closed.

However he paper is not locked,  I have opened and closed the tank cap several times. But this message always appears.

What should I do next

[Mirco45]

I have tried all sorts of resets but my HP Smart Tank 7605 printer prints regularly and HP Smart gives OK, but the screen is frozen on the ink request. Somebody has some suggestion?

Many thanks

[BeemerBiker]

Something went wrong, you may need to have it serviced.

Click here to check warranty
and
Click here for world-wide contact info

Or contact the closest authorized service center

These videos were created by HP support.
Possibly one or more of them might be useful.