My control panel light on my HP7740 stays on constantly.

[Msmurphy53]

My HP7740 OfficeJet Pro control panel stays on constantly. I am using an iMac with Sequoia 15.1.1 OS. Help get the lights to go to sleep>

[Nal_NR · Accepted solution]

Hi @Msmurphy53,

Welcome to the HP Support Community. 

I'd be glad to help you! 

I can understand how annoying it must be for the control panel lights on your HP OfficeJet Pro 7740 to stay on all the time. Let's work through some steps to resolve this issue.

To better understand the situation:

• Have you noticed if the printer’s control panel stays on regardless of whether it’s idle or actively printing?
• Have you checked the power settings on the printer to ensure it’s set to go to sleep after a period of inactivity?
• Is the issue specific to the printer when connected to your iMac, or does it happen even if you're using other devices to print?

Here are five troubleshooting steps you can try:

Check Printer Sleep Mode Settings: On the printer’s control panel, navigate to the "Sleep" settings and ensure it is set to automatically enter sleep mode after a certain period of inactivity. If this setting is already enabled, try adjusting the time to a shorter interval and test again.

Update Printer Drivers & Firmware: Sometimes, firmware and driver updates can resolve power-related issues. Make sure your HP OfficeJet Pro 7740 has the latest firmware installed. You can check for updates through HP Smart or by visiting the HP support website.

Reset Printer Settings: Try resetting the printer to its default settings. This may resolve any misconfiguration that might be causing the lights to stay on. You can usually find this option in the printer’s menu under "Restore Defaults."

Disconnect and Reconnect Power: Unplug the printer from the power source for about 60 seconds, then plug it back in. This can sometimes help reset the power management settings and restore normal sleep behavior.

Test with Different Connection (Wi-Fi or USB): If you are connected via USB, try switching to a wireless connection, or vice versa. Sometimes connection types can cause minor communication issues that affect the printer's behavior.

Keep me posted for further assistance

Please mark this post as “Accepted Solution” if the issue is resolved and if you feel this reply was helpful click “Yes”.

[Msmurphy53]

i seem to have remedied the problem a few days ago by checking the Power Management settings which were what I wanted. But disconnecting the power at the back of the printer for 60 seconds & reconnecting seems to have fixed my problem. 

Thanks for the reply with possible solutions.

Michael

[Nal_NR]

Hi @Msmurphy53,

That's wonderful news. Do keep us posted if anything in the future.  Take care

Happy Holidays ahead!