open the printhead cover & check all printheads, make they all seated properly.
if printer can boot up ok , in ready mode.
Perform a printhead alignment first...... if it said printhead bad , then go to replace printhead.... take out the printhead & clean it, shake it & see if any ink.... if dry & you should replace with new printhead..
after replace printhead & do printhead alignment again & make sure it pass.
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