Ink Cartridge Refill Help Center

How an Inkjet Printhead Works

The Printhead is essentially the heart of the 4, 5 and 6 ink-cartridge printing system. While the ink cartridges, or tanks, merely hold the ink, it is the electronic printhead which is responsible for firing the ink drops onto the page – not the ink cartridges/tanks!

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Severe Print Quality Issues / Missing Colors

If, after adhering to all suggestions provided under ‘Solve My Problem’, your printer continues to exhibit degraded image quality and/or multiple colors are missing, as observed in the printer’s self test page or print quality report, you many need to perform a water flush of the printhead:

Warm (Hot) Water Printhead Flush

HP 564 Ink-Series Printer Models

HP 920 Ink-Series Printer Models

Canon Printhead Flush Procedure

Epson Printhead Cleaning



Printhead Life – All 4, 5, & 6 ink cartridge Printers: 

The replaceable or semi-permanent PRINTHEAD (or PRINTHEADs for HP 88 & HP 940 ink-series printer models) will eventually fail over time with usage and age. Click here for more information.

Possible Printhead Failure? 


To learn more about Printhead Function & Failure conditions, please select your printer model:

HP 950/951 Ink Series Printers:

HP OfficeJet Pro 8100 Printer ( N811a ), HP OfficeJet Pro 8600 Printer ( N911a ),  HP OfficeJet Pro 8600 Plus Printer ( N911g ),  HP OfficeJet Pro 8600 Premium Printer ( N911n ),  HP OfficeJet Pro 8100 Printer ( N811d ),  HP OfficeJet Pro 8610 eAIO Printer ( A7F64A ),  HP OfficeJet Pro 8620 eAIO Printer ( A7F65A ),  HP OfficeJet Pro 8630 eAIO Printer ( A7F66A ), HP OfficeJet Pro 251dw Printer ( CV136A ), HP OfficeJet Pro 276dw  MFP Printer ( CR770A ), HP OfficeJet Pro 8610 eAIO Printer ( E1D34A ), HP OfficeJet Pro 8615 eAIO Printer ( D7Z36A ),  HP OfficeJet Pro 8616 eAIO Printer ( J5T77A ), HP OfficeJet Pro 8625 eAIO Printer ( D7Z37A ), HP OfficeJet Pro 8640 eAIO Printer ( E2D42A ), HP OfficeJet Pro 8660 eAIO Printer ( E1D36A ).


HP 932/933 Ink Series Printers:

HP OfficeJet 6100 eAIO Printer ( N611a ),  HP OfficeJet 6600 eAIO Printer ( H711a ),  HP OfficeJet 6600 e-All-in-One Printer ( H711g ),  HP OfficeJet 6700 Premium eAIO ( H711n ), HP  OfficeJet 7110 Wide Format ePrinter ( H812a ), HP OfficeJet 7610 Wide Format e-All-in-One ( CR769A ).


HP 934/935 Ink Series Printers:

HP OfficeJet Pro 6230 Printer, HP OfficeJet Pro 6830 Printer, HP OfficeJet Pro 6835 Printer, HP OfficeJet  6812 eAIO Printer, HP OfficeJet 6815 eAIO Printer, HP OfficeJet 6820 e-All-in-One Printer, HP OfficeJet 6810 e-All-in-One Printer  



Advanced HP Printer Diagnostics

To view advanced diagnostics tests for your HP printer, click here:

HP Printer Diagnostics



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