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I have an hp deskjet 3940 printer and the power light keeps flashing; moreover; the moment I turn on my pc, the inkcartridges slam from left to right.

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There is a plastic strip that the cartridges move along with small positioning markings on it. When this strip gets coated with ink the sensors cannot read the position causing the cartridges to go beyond the end mark and slam. Unplug the printer power and open it to access the cartridges, use a cloth damp with water and clean this strip - BE VERY CAREFUL NOT TO DAMAGE OR DISCONNECT IT!

Posted on Jan 19, 2009

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