About PrintDiag

A free printer guide and troubleshooting reference, open to readers anywhere. No account, no lead capture, and no routing to paid phone support.

How verification works

Facts marked verified are checked against linked manufacturer documentation and dated. Reported or unverified compatibility facts are withheld from public pages. “Verified” means documented, not physically tested, unless a page explicitly says otherwise.

Where our coverage is regional

Error-code meanings and connection procedures are firmware and operating-system behaviour, so they apply wherever you are. Supplies are the exception, and we would rather say so than let it be assumed.

Part numbers on this site are sourced from US manufacturer documentation and apply to the US market. Ink, toner and drum SKUs differ by region — outside the US, check the number against your local manufacturer support site before buying.

Independence

PrintDiag is an independent, third-party printer guide and informational troubleshooting resource, serving readers worldwide. It is not affiliated with, sponsored by, endorsed by, or authorised by HP, Canon, Epson, Brother, or any other printer manufacturer named on this site. Brand and product names are trademarks of their respective owners, used here only to identify the products a fix applies to. Facts are verified against manufacturer documentation; each page states what was checked and when.