I have a fully patched Windows XP PC talking to an HP OfficeJet Pro L7780 via ethernet. The HP Digital Imaging Monitor is version 7.0. The HP Solution Center is 70.0.128.000.
Prior to 4/21 it worked fine. On 4/21 Windows updates were performed, and the device will no longer scan. It prints fine, but when you click on either the HP Solution Center icon (desktop) or the HP Imaging icon (system tray) you get the same error message: "No HP devices have been detected. HP Solution Center will close now."
How do I get the HP Solution center to once more recognize the device on the network?
1. Windows firewall has no effect.
2. I can ping the printer's IP just fine.
3. I can access HP's web interface and web scan works fine.
4. The HP appears in Device Manager / Imaging Devices.