AirPrint lost on iOS mobile devices

[LadyPesky]

Suddenly lost ability to print only from our iPhones and iPads after removing print head for cleaning. Perhaps that's coincidental. We can still print from a Windows PC and a MacBook Pro. Printer is is six years old. Router is four months old and our WiFi network connection is good. I have reset ALL devices multiple times without change. AirPrint and Bonjour are enabled. HP Support article suggested Wiless Direct printing as an alternative but the printer's network, although detected, says 'no internet connection' when selected. Apple support tried but suggested all the things ive already tried. All devices were working and able to print....until they didnt. 

[senan6806]

@LadyPesky

A warm welcome to HP Support Community!

Updating the printer firmware, iOS, resetting the printer network settings and then re-connecting the printer back to your home WiFi may resolve the issue. Let's try these steps:

1.) Use the steps available here to update iOS.

2.) Use the steps available here to update the printer firmware. 

3.) Unplug your modem/router and leave it powered off.

4.) Restart your printer, from the printer control panel, touch "Setup". Touch " Wireless" menu, touch "Restore Network Defaults".

3.) Power off your printer

4.) Reconnect your modem/router and wait for it to re-establish its internet connection.

5.) Power on your printer.

6.) On the printer control panel, touch "Setup". Touch Wireless and select Wireless Setup Wizard, follow the on-screen instructions to connect the printer to your home WiFi.

7.) Try to print.

Let me know how it goes!

If the information I've provided was helpful, give us some reinforcement by clicking the Accepted Solution and Kudos buttons, that'll help us and others see that we've got the answers!
Have a great day!

[LadyPesky]

Thank you Senan6806 for your suggestions. Here are the results:

iOS devices are all updated.

Update Directly from Printer - "Printer has most current updates installed".  Automatic updates is enabled BTW. 

Download Firmware from HP on my Mac - No printers appeared on the Device Discovery so I added it manually. "This firmware Updater does not contain upgrades for your device."

Believing the problem is with the printer we purchased an HP OfficeJet 6958 a few days ago and it easily connected to our wireless network and ALL iOS devices. I havent connected it yet to MacBook or Windows PC but assume there won't be a problem. I wanted confirmation that inability to print from iOS mobile devices was related to PhotoSmart 7525. Apparently it is.  I still prefer the PhotoSmart 7525 for printing photos (two paper trays - paper/photo). 

From the HP Smart App on my phone I can see BOTH printers. Both are Ready.  I wasn't able to find Printer Updates.  The only options under Advanced are Printer Information, Network Information and Forget This Printer.  All the information is there for the PhotoSmart 7525 and I CAN PRINT Status Report, etc from within the app.  However, I still cannot print an email, webpage or photo. The only AirPrint printer found is the OfficeJet 6958.

If you have any other ideas I'd appreciate hearing it. Thank you!

[senan6806]

@LadyPesky

Have you tried resetting the printer network settings on HP Photosmart 7520 and re-connecting it back to the network? If you have tried resetting the printer network settings and re-connecting it back to network, then try the steps mentioned below "What if a 'No AirPrint Printers Found' message displays" under FAQs from this document.