Hp printer 455 smart tank all lights flashing with Error E but no letter after .

[Glennadams]

All lights flashing on my smart tank hp455

theres is an error E but there isn’t a number after the E . 
tanks are full , any suggestions please

[Hawks_Eye]

Hi @Glennadams 

Welcome to the HP Support Community! We're here to help you get back up and running.

That flashing “E” with no number on your HP Smart Tank 455—and all lights blinking—is usually a sign of a fatal error state or a firmware glitch, especially if the ink tanks are full and there’s no obvious paper jam or printhead issue. 

Let’s try a few proven steps to reset the printer and clear the error:

Step-by-Step Fix for HP Smart Tank 455 “E” Error with All Lights Flashing

1. Perform a Full Power Reset

• Turn off the printer using the power button.
• Unplug the power cord from the wall and the back of the printer.
• Wait 60 seconds.
• Plug it back in and power on—this clears internal memory and resets sensors.

 

2. Check for Printhead Issues

• Open the printhead access area.
• Make sure both printheads are seated properly and the latch is fully down.
• If you recently replaced them, try reseating or cleaning the contacts gently with a lint-free cloth.

 

3. Run a Printhead Cleaning Cycle

• If the printer powers on normally after reset, use the HP Smart app or printer control panel to run a printhead cleaning.
• This can help if the error was triggered by ink flow or nozzle detection issues.

 

4. Update Firmware (if accessible)

• If the printer becomes responsive, go to HP’s support page for Smart Tank 455 and check for firmware updates.
• Install via USB or HP Smart app.

 

5. Factory Reset (if nothing else works)

• With the printer powered on, press and hold the Cancel + Wireless + Copy Black buttons together for 10 seconds.
• This triggers a factory reset—use only if other steps fail.

If the printer stays in the blinking state even after these steps, it may need a service reset from HP support or a firmware recovery via USB. 

Let me know if you want help with that process—I can walk you through it. You're doing all the right things by checking the tanks and error codes. Let’s get this sorted.

If my response helped, please mark it as an Accepted Solution! ✅ It helps others and spreads support. 💙 Also, tapping "Yes" on "Was this reply helpful?" makes a big difference! Thanks! 😊

Take care, and have an amazing day!

Regards, 

Hawks_Eye

[Glennadams]

I have carried out the procedure recommended and performed printhead cleaning and printed various test pages but the printer still occasionally stops responding with printhead alert light , resume lights and information light flashing orange with all other lights flashing including on/off button.

[Hawks_Eye]

@Glennadams 

We sincerely thank you for your patience and co-operation during this troubleshooting process.

I'm sending you a private message to guide you on the next steps.

To access it, click the private message icon in the upper-right corner of your HP Support Community profile, next to your name.

If this resolves your issue, kindly mark this post as "Accepted Solution" and click "Yes" if it was helpful.

Take care and have a great day!

Regards,

Hawks_Eye

[Glennadams]

I have replaced the print heads. there is no power on button illuminated , there is a white steady wifi direct light on, wireless blue light on steady ,resume light steady orange, printhead alert light on steady with no response pressing CANCEL+ WIFI + BLACK COPY  for 10 seconds ( factory reset )

[Glennadams]

I can't find access to a private message

[VikramTheGreat]

Hi @Glennadams,

Welcome to the HP support community.

Could you elaborate on the issue for better understanding?

Please help us with the Printer serial number or the product number in a private message for further assistance.
 

Here is the link to find the product serial number: - Click here

To access your private messages, simply click the private message icon on the upper right corner of your HP Support Community profile, next to your profile and send a private message to me with the serial number, because we value your privacy.
 

VikramTheGreat

HP Support

[Glennadams]

I still don’t know what the private message icon is .

im not getting anywhere the support is too complicated . Think I’ll end up ditching the printer and buy something else . Ive spent hours trying to rectify the fault .

[VikramTheGreat]

Hi @Glennadams,

Thank you for getting back. We are sending the private message from our end. Reply to that response with the details so we can try and find all the help we can.

To get you the best assistance, we need to take this conversation to a private chat. We're inviting you to a private message to protect your privacy and ensure that any sensitive information remains confidential. 

To access your private message, just click the little blue envelope icon on the upper right corner of your HP Community profile, next to your profile name.  

We're looking forward to helping you resolve this issue! 

Stay tuned, and thanks for your patience! 

VikramTheGreat

HP Support