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Re: Hp LaserJet 3500 - no cyan (COMPLETELY) - errors 54.12.00 and more (edit)

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Did you check the contacts I told you about? A power supply provides voltage to many places and each toner cartridge receives voltage from the power supply thru those contacts which have springs pressing against them when the toner rack moves to the inside. Those springs come off the high voltage board and it is very possible the voltage provided to the cyan contacts has failed even though it still goes to the other colors.  See the attached for a picture of the contacts I am telling you about.


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