All lights blinking in HP Deskjet GT 5820

[Tote44]

I have an HP Deskjet GT 5820 printer that stopped working out of nowhere. One day I turned it on and all the lights and icons on the screen were blinking without giving any error code, just the E, as seen in the image. In this state I can't connect to the printer through HP smart or its webpage and I can't print nor scan. I have tried factory resetting it by holding the wireless and power button at the same time while having the cartridge tray open and as soon as the printer boots, all lights start blinking again. I have also tried un plugging it, waiting and plugging it back in. What could be the cause or solution to this problem? Thanks.

[Max3Aj]

@Tote44, Welcome to HP Support Community. 

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

And thanks for sharing the image—what you’re seeing on your HP DeskJet GT 5820 (all lights blinking, display stuck with an “E” and cartridge icons) is a classic sign of a critical error state. Here’s a breakdown of what this typically means and what you can try next:

What the Lights Mean (from your image):

• All lights blinking simultaneously: Indicates a fatal error—the printer has encountered a condition it cannot recover from automatically.
• “E” on the display: Stands for “Error.”
• Cartridge icons blinking: Most commonly means one or both ink cartridges are not recognized, are missing, or are malfunctioning.
• Wireless & info button LEDs: Also blinking, indicating the printer is not communicating properly over the network.

Steps to Troubleshoot:

Check Ink Cartridges Physically

Remove and reinsert the cartridges:

• Power off the printer and open the cartridge access door.
• Take out both the black and color ink cartridges.
• Make sure there's no tape on the cartridge contacts.
• Clean the copper-colored contacts with a lint-free cloth (lightly dampened with distilled water).
• Reinsert them firmly and close the door.

Check for Paper Jams or Obstructions

• Remove any paper from input and output trays.
• Open all access areas and inspect for even tiny scraps of paper or obstructions.
• Rotate the rollers gently if you can.

Hard Reset

Since the factory reset didn’t work, try a hardware reset:

1. With the printer powered on, disconnect the power cord from the back.
2. Wait 60 seconds.
3. Press and hold the Power button for 15 seconds while reconnecting the cord.
4. Release the button and see if the lights stabilize.

Service Mode Reset (Optional)

Try pressing and holding:

• Cancel (X) + Wireless + Power until the printer powers off and restarts. This sometimes triggers a deep firmware reset. If it doesn't, just unplug and restart manually.

Update Firmware (If Accessible)

If you're ever able to connect to the printer briefly via USB, try using HP Print and Scan Doctor (Windows) or update firmware manually from HP's website: 👉 HP GT 5820 Drivers and Firmware

You may refer to this document.
 

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. Select "Yes" on the bottom left to say “Thanks” for helping! 

Max3Aj

HP Support