Refilling print cartridges – HP Deskjet 3420 Color Inkjet Printer User Manual
Page 60
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refilling print cartridges
To get the best performance from your HP printer, use only genuine, factory-filled HP
print cartridges.
Caution!
Damage that is directly attributable to modified or refilled HP print cartridges is
specifically excluded from the HP printer’s warranty coverage.
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