Smart tank 725 whole lights blinking

[Gedoral21]

Hi there,

I just changed the print heads of my HP smart tank 725 printer and it doesn’t want to reboot.

the printer is stuck with the whole lights blinking.

i switched it off many times , tried to reboot but still stuck.

any idea to avoid trashing it ?

[Max3Aj]

@Gedoral21, Welcome to HP Support Community. 

Thank you for posting your query, I will be glad to help you. 
It sounds like your HP Smart Tank 725 is experiencing issues related to the printhead installation, which is common after a replacement. Here are some troubleshooting steps to help resolve the blinking lights issue:

Check the Printheads Again

• Remove the printheads (both black and color) and inspect them.
• Clean the gold contacts on both the printheads and the carriage using a lint-free cloth lightly dampened with distilled water.
• Reinsert the printheads carefully, ensuring they click into place properly.

Reset the Printer

• Turn off the printer and unplug it from the power source.
• Wait for 2-3 minutes to allow any residual power to discharge.
• While unplugged, press and hold the power button for 15-20 seconds.
• Reconnect the power cable and turn the printer back on.

Check for Jammed Carriage

• Open the front cover and ensure the carriage moves freely from left to right.
• If the carriage is stuck, gently move it to the center and remove any obstacles.

Use a Forced Firmware Recovery (if applicable)

• Disconnect the power and leave it unplugged for at least 5 minutes.
• While holding the Power + Cancel buttons, reconnect the power and keep holding the buttons until the lights stop blinking.

Try a Factory Reset

• Turn off the printer.
• Press and hold both the Power and Resume buttons (triangle icon) simultaneously for 10-15 seconds.
• Release the buttons when the printer starts flashing different lights.

Check for Ink System Errors

• If the blinking lights persist, there may be an ink system failure.
• Try removing and reinserting the ink tanks securely.
• Ensure that you have removed any protective seals from the printheads.

I hope this helps. 

Take care and have a good day. 

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! 

Max3Aj

HP Support