-Check the print cartridges and toner levels. If there is low toner or cartridge ink levels, the printer will not print correctly. Replenish the cartridges as needed.
-Make sure that the computer is connected to the printer and that it is powered on. The printer may not work if it is not connected properly.
-Ensure that the cables between the printer and computer are properly plugged in. If they are not, the printer may not be able to communicate with the computer.
-Verify that all software on the computer is up to date. Old software may be preventing the printer from working properly.
-Try printing a test page from the hp printer's document feeder to see if anything is wrong with the document itself. If nothing prints correctly, it's likely a problem with the computer or network connection.