回答“Full cartridge but ink not printing.”It may not be a printer problem at all. I have been through all these scenarios and come to the conclusion its either a Windows problem or a Microsoft problem. I even de-installed Office 365 and re-installed it. No joy!But just by accident I needed to print an online receipt and it worked! So at least I know its not the HP 4620 and therefore in all probability not your printer problem either but a software issue. For the moment, I am going online to my accounts to print anything from my mails. Only problem is printing in Word/Outlook. Update (07/05/2018): ...slight correction, nothing local works, have tried a simple copy...comes out blank.