Model HP6510. Black Cartridge won't print from computer or copy. A new cartridge was installed but it just prints blank or a very light blue. Yes, it is installed correctly. The other three colors work just fine. Any help?
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Model HP6510. Black Cartridge won't print from computer or copy. A new cartridge was installed but it just prints blank or a very light blue. Yes, it is installed correctly. The other three colors work just fine. Any help?