Does using a non-HP or refilled ink cartridge void the warranty on the OfficeJet 3830?

The use of a non-HP cartridge or a refilled cartridge does not affect the warranty to the customer or any HP support contract. However, if printer failure or damage is attributable to the use of a non-HP, refilled, or expired ink cartridge, HP will charge its standard time and materials charges to service the printer for that particular failure or damage.

From the official HP Officejet 3830 All-in-One Printer manual, page 4

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