Ink alert light flashing but cartridges are full

[Attrading]

I have recently replaced the ink cartridges on my 3720 All in one printer. Today I printed 20 sheets and when the printer had completed the task I sent another document to print however the second document failed to print and I got a message that the printer is offline. When I investigated the printer I saw the ink alert light and network services light both flashing amber. I have followed the steps I could find suggested online,  the cartridges are genuine, correct for the printer and ordered from HP. Have tried disconnecting the power cord for 60 seconds, powered back up and light came back on. 

[Nal_NR]

Hi @Attrading,

Welcome to the HP Support Community. 

I understand that you are getting an ink alert error. I'd like to help!

Please follow the document here and see how it goes. 

Hope this helps! Keep me posted for further assistance.

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!

[Attrading]

Hi there I have tried following the instructions on the document provided however the document specifies that if the Instant ink icon and Web servies icon are both flashing amber to press information button twice to resume printing but when I did this nothing happens.

[sandytechy20]

@Attrading

Welcome to the HP support community.

I understand that you are getting cartridge error, I am glad to assist you.

Meanwhile, follow these steps to fix the issue.

Turn On Web Services

• Make sure the printer is connected to a wired (Ethernet) or wireless network with an active internet connection.
• NOTE: If you connect your printer to a computer with a USB cable, web-connected printing services do not work.
• If your printer is connected with a wired (Ethernet) connection, check the cable and the lights on the printer’s Ethernet port. The green link light should be steady, and the orange activity light should blink when the cable is connected.
• If your printer is connected with a wireless connection, make sure the wireless feature is on and the printer is connected to the same network as your computer.
• Some printers have a wireless icon and a blue light on the front of the printer. If the printer has a blue light, and the light is on and not blinking, your printer is connected.
• Print a Network configuration or Wireless Network Test Results page using button combinations on the printer control panel.
• Find the printer IP address on the printout.
• 
• Type the printer IP address into the browser address line, and then press Enter
• NOTE: Make sure to type the IP address into the internet browser's address box. If typed into a toolbar search box or search engine, the EWS does not open.
• If a login or certificate window displays, complete the information to finish opening the EWS.
• If a website security certificate displays, click Continue to open the EWS.
• If a login window opens, type admin for the username, and then type the PIN found on the printer UPC sticker located underneath or on the back of the printer, or the password set by the printer administrator.
• 
• On the EWS, click the Web Services tab.
• If the tab is not available, your printer does not support Web Services.
• If a summary page displays, Web Services is already on.
• 
• If a setup page displays, follow the prompts to turn on Web Services.
• NOTE: If you cannot turn on Web Services, make sure the printer firmware is up-to-date. For more information, go to Updating or Upgrading Printer Firmware.
• 

Refer to this HP document for more assistance:- Click here

Let me know how it goes.

To thank me for my efforts to help you, please mark my post as an accepted solution so that it benefits several others.

Cheers.