How to enable power saving sleep mode hp OfficeJet J5750

I am trying to find out How to enable power saving sleep mode hp OfficeJet J5750 All-In_One Printer.  I have looked in all of the menus on the printer and also in the User Guide. and have not been able to find out how to put the J5750 into  an energy savings mode...   Other HP older AIO HP printers I have had do have a setting to activate and control going into energy savings mode.   Any suggestions?  
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I chatted with an HP tech, who verifies that this unit does not have a Power Save mode.

Transcript below:
Griffith: Hi Mich
Griffith: Welcome to HP Total Care for All-in-One products. My name is Griffith.How may I assist you today?
Michko: Hello. I have a question regarding an OfficeJet J5750. It is not going into power save mode. I looked through the web site, help, faqs, etc., and could not find how to enable power save mode for this model. Could you please provide these instructions?
Griffith: Sure, Let me check if there is an option to power save for this model
MichKo: Thank you.
Griffith: You are welcome.
Griffith: Thank you for staying with me online.
Griffith: Mich, I regret to inform you that the power save mode is not an option in the HP Officejet J5780 All-in-One.
MichKo: Well, then that answers that question. Thank you.

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rehrensAuthor Commented:
Thanks for such rapid response and for doing the research to solve what I thought was the case
No problem.  I typically chat with them a few times a week, so I'm used to it.

Thanks for the close.

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