Designjet T3500 can't print using driver - possible Windows 11 update problem

[copyc]

Hello, we have a network of 6 PCs running Windows 11, and a HP Designjet T3500ps. 

Since last week (21st Novemeber 2025), all PCs can no longer print using the Windows printer driver. 

The printer is not at fault, and printing via HP Click works fine. 

Other printers on the network are all working fine (Konica Minolta). 

I've gone through lots of troubleshooting steps trying to isolate the problem, even uninstalling and reinstalling the driver, but I still can't print. 

We use the Postscript driver, and the latest firmware. 

The specific problem is that Windows sees the printer as offline.  I've cleared the print cache, restarted the print spooler, tried printing from Acrobat 'print as image'. Print jobs go to the print queue and don't move. 

I can only think it's a Windows update problem. I can't actually roll back the update either.

I can't find a way to report this so am trying here. 

Any help would be appreciated. 

[copyc · Accepted solution]

All solved, for some reason the printer IP address had changed itself.  I'm not sure why.

HP Click could find the printer, but the drivers were set to the original IP address. 

It error coded recently after a paper jam, and restarted into diagnostics, but I can't see why the network settings would change. 

No one has manually changed the printer network settings, so it's a bit concerning. 

All solved anyway.