Hello peaty14,
I understand when you try to print to your HP Photosmart 7520 the first print is successful, but when you send a second print job you have to power off the printer and restart it. This is not a normal function of the printer, and have seen other members who have disabled the UPnP option that can sometimes cause this to happen. Follow the steps listed below:
Disable UPnP in printers EWS:
Follow the steps below to access the EWS of the printer.
1. Typing the printers assigned IP address into the address bar of Internet Explorer.
2. Network Tab
3. Networking option on the left
4. UPnP option on the left
5. Select the 'Disable UPnP' radio button
6. Click 'Apply'
Please let me know if this resolved the issue. I will watch for your reply.
Thanks,