Fix HP Deskjet 3420 Won’t Print
The HP Deskjet 3420 Troubleshooting issue might be due to ink cartridge problem, outdated firmware, or hardware malfunction. Ensure that you load enough papers into the paper tray. Do not load inappropriate papers or overload the tray. Avoid using non-HP ink cartridges and use only genuine cartridges. Make sure to get the latest version of the driver for the printer. Check whether the printer firmware is up to date. Replace the ink cartridges and clean the printheads regularly. Ensure that the print settings are apt for your current print job. Service the printer in an authorized service center.