If you have tried the test page and it has printed out fine, but are still having issues you could be dealing with a connection issue. Printers can be connected locally or through a network. Local printers are typically connected by a USB while printers use a parallel cable. If you are using a USB, ensure that the USB cable is connected to both the printer and the computer. Try changing the USB cable if you have another one handy, or use a different USB port if available. If the connection is still not working, then the USB or printer drive could possibly be corrupted. A corrupted USB is a software issue.
Parallel cables are hardly used anymore, but if you are using one then ensure that the cables are connected firmly to both the printer and computer. Unlike USB, the parallel cable either works or does not work.
Troubleshooting printers that are part of a network are more difficult. If you do not have experience with printers or computers, it is advisable to contact a specialist to assist you. If multiple computers / printers are affected, make sure that the connection is properly established. The issues could stem from the router / switch, the wrong IP address, or a misconfiguration. For one of these issues, contact your local IT specialist.
If only one computer is giving you a problem, it is possible that the printer is misconfigured with the computer. You can try to reconfigure it, but if that does not work then the issue may be more complex. Again, then must contact IT specialist at Hp Printer Support UK would be able to help you!