HP 7855 won't go into sleep mode

[glawther]

My HP 7855 printer will not go into sleep mode. I've tried the power button as well as the options in Power Management. When I press the power button, it does the countdown to go into sleep, goes blank as though it is in sleep, then come right back on. It is set to go to sleep in 5 minutes. Changing that time to a different time interval did not fix it. Have  reset printer by disconnecting power multiple times and even did a factory reset and re-install of the printer. The problem remains. Would welcome any suggestions for something else to try. Looking like a hardware problem?

[Treeko]

Hi @glawther,

Welcome to HP Support Community. 

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

I see that you are facing issues with HP ENVY Photo 7855 All-In-One Printer.

Kindly refer to the steps on this link and let me know if that fixes the issue. 
 

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!

I hope this helps.

Take care and have a good day.

Treeko

HP Support

[glawther]

Thank you for your suggestion. Re-checked the firmware. According to HP Smart and the HP website, the firmware is up to date.

[Bernard42]

   Hello @glawther, 

Different methods to reactivate standby:

https://support.hp.com/in-en/document/c04183583

    Excellent Day.