Color Definition: Yellow: 
This test checks if the missing color is caused by the yellow print cartridge 
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If you have another new or undamaged used yellow print cartridge available, use it as a replacement.
- Install the replacement yellow print cartridge. Show me how.
- Wait until the printer returns to the Ready state. Note that this will take several minutes.
- Print another set of PQ troubleshooting pages. Show me how.
- Look at the new set of test pages. If the issue is not resolved, contact HP: CP4025, CP4525.
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If you do not have another yellow print cartridge, click here.
