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- What do I do when my HP OfficeJet Pro 9730e says all my colo...

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05-14-2025 03:06 AM
Recently purchased and installed a black ink cartridges when. I only ever printed black on white. Now, my HP OfficeJet Pro 9730e won’t work saying I need new colour cartridges. I have never printed in colour. Do I need to buy a new set of cartridges or is this a printer error?
05-14-2025 04:47 AM
Note that this is a user to user forum and I am just a messenger of this bad news: According to page 36 of the users manual
● Some color ink is used even when printing with black cartridge only
This is true for other OEM, not just HP.
You may try cleaning the printheads but I suspect you need to replace one of the colored ink cartridges.
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