Question about HP LaserJet 2420 Printer

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An hp 2420n has show an errror. the attentionled flashes and it display the comment: close top cover. i however do not see anything wrong with it. i also have problems determining which cover is mentioned. i do not have any manual at hand for any diagram. the top cover , is that the one at the front, the L-shaped one? as far as i see, it is closed properly. it can however hbe that the switches are not actuated proeprely. where and howmany switches are there present and how can i check on them? the printer services a school library and it provides a significant inconviniance. thanks

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Top cover (above) has a sensor that senses and is not closed or that the sensor is defect.open top cover(where you can find cartridge) and so can reinchidel will recover

Posted on May 25, 2011

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ISSUE: The printer displays an assert error code. Assert error codes indicate that the printer has an internal condition that may respond to a hard reset of the printer. Beyond that, service may be required. This document applies to the following products:
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