How can I diagnose and fix connectivity errors when my HP LaserJet 2700 won't print from my computer?

To diagnose connectivity errors with your HP LaserJet 2700, begin by checking the physical connection: ensure the USB cable is securely plugged into both the printer and the computer, or if it's a network printer, verify the Ethernet cable is connected and the network link lights are active. Try printing a test page directly from the printer's control panel to confirm the printer itself is functional. On your computer, check if the printer is listed as 'online' or 'ready' in the 'Devices and Printers' (Windows) or 'Printers & Scanners' (macOS) settings. Restart both your computer and the printer. If using a network, ping the printer's IP address from your computer. Reinstalling the printer drivers can also resolve software-related connectivity issues. Ensure your firewall isn't blocking communication to the printer.