HP Wireless Printer Problems
The first thing I realized with having a wireless printer is that it’s totally at the whim of the wireless router. If your router is having issues, which they do all the time, then your printer will no longer work. This is true even if you are able to connect to the Internet with a computer that is wireless connected. I can’t tell you how many hours I wasted trying to change settings on the printer and computer, only to find out I had to restart the router and everything worked fine!
So the first thing you should do is turn off your computer and turn off the printer. Go ahead and restart the wireless router by unplugging it and then waiting 30 seconds and then plugging it back in. Then switch on your computer and then switch on the printer. Let everything connect and then try to print again.
Check Wireless Connectivity
The second thing you need to do is make sure that the printer is still connected to the wireless network. Once you have a printer for a long time, you tend to forget that it depends on the wireless network. You might make a change to your wireless router (password, mode, SSID, etc) and all of a sudden your printer is no longer connecting.
The main thing to do is to print the network configuration sheet directly off the printer. There is usually a button or a menu option that lets you print the current network status. It will tell you if it is connected to the wireless network or not. If you see an IP address like 169.254.x.x, that means your printer is not connected to the network properly.
Did you recently install any software on your computer like an anti-virus program or any kind of Internet Security suite or additional firewall?