Since your printer is connected to the network already you can modify the setting from the SyncThru Web Service, you can open it from your computer on a Web browser by typing in the IP address assigned to the printer (ie. 192.168.xx.xxx), once you have the server open you will need to login
Then select settings > machine settings > turn the "wake up event" on > click on "apply" to save the change
Let me know if you are able to modify the seeting.
Be alert for scammers posting fake support phone numbers and/or email addresses on the community. If you think you have received a fake HP Support message, please report it to us by clicking on "Flag Post".