HP C7280 magenta ink starvation

guho

Getting Fingers Dirty
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Canon Pro9000 Mark II
Hi, I have an HP PhotoSmart C7280 (HP 02 carts), which has clean nozzles according to the diagnostics print but the large band in magenta shows ink starvation. From your experience is this more likely to be a clogged tube somewhere or a problem with the printhead?

I did loads of resets, including NVRAM OOB resets, to purge any air that might be in the system & the issue persists so I am fairly sure it is not air bubble but a real blockage somewhere. Also tried different genuine full Magenta cartridge.

All its life this printer has only used Genuine HP 02 cartridges. No aftermarket ink at all.
See attached photo https://photos.app.goo.gl/70WTDocjIKlWH3XB3. Thanks for your advice.
 
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