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Print Quality Troubleshooting Tool for HP Color LaserJet 4730mfp

Cartridge test procedure using replacement cartridge

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This test checks if the white vertical lines are caused by the cyanprint cartridge

If you have another new or undamaged used cyan print cartridge available, use it as a replacement.

Install the replacement cyan print cartridge.
Print another set of PQ troubleshooting pages to check. Show me how.
Look at the new set of test pages.
If the white vertical lines disappear, the cyan print cartridge that you removed is damaged. Replace the cyan print cartridge with a new cyan print cartridge.
If the white vertical lines do not disappear, contact HP.

If you do not have another cyan print cartridge, click here.