Error message UU on HP Deskjet 3630

[GB1359]

• What does error message UU mean on a HP DESKJET 3630 printer mean?

[A_Gayathri]

Hi @GB1359 ,

Welcome to The HP Support Community.  

Thank you for posting your query, I will be glad to help you.

I understand you are getting the "UU" error message on an HP DeskJet 3630 typically indicates a general or undefined error. It's often related to an issue with the printer's internal hardware or a problem with the printhead or cartridges.

Here are some steps to try and resolve the issue:
 

• Check for Jams: Ensure there are no paper jams or obstructions in the paper path.
• Power Cycle: Turn off the printer, unplug it from the power source, wait for about 30 seconds, then plug it back in and turn it on.
• Check Cartridges: Open the printer and make sure the ink cartridges are properly installed. Remove and reseat them if necessary.
• Reset Printer: Perform a hard reset on the printer. This usually involves pressing and holding the power button for a few seconds until the printer restarts.
• Update Firmware: Ensure the printer's firmware is up to date. This might require connecting the printer to a computer or using HP's software to check for updates.Update the firmware on an HP printer 
  
   

Refer to this document: HP DeskJet 3639 All-in-One Printer User manual

HP DeskJet 3630, 4720 Printers - Blinking Lights
 

I hope this helps. 

Take care and have a good day.

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