HP Laserjet 2420 Printer Offline
Power on the HP Laserjet 2420 printer by pressing the Power button. Load sufficient papers into the paper input tray. Install the toner ink cartridge into the ink cartridge chamber. Wait until the HP Laserjet 2420 printer is silent before you perform to the next step. With the printer powered on, detach the power cable from the printer and the power supply. Wait for 10-15 seconds and proceed to re-establish the connection. Plug in the power cord back into the electrical outlet and the printer. Press the Power button and power back the printer. The factory defaults will be restored on your 123.hp.com/lj2420 printer and try to print a sample page.