Question about HP Designjet T790 44-in ePrinter

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Problem with HP Designjet T790 44-in ePrinter

Initializes until 94% then stops and starts clicking

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Posted on Jan 02, 2017

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SOURCE: HP 800 designjet plotter Error Message 21:10

need to replace service unit

Posted on Mar 22, 2010


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Sounds like your power supply bit the dust. The power supply on this printer is similar to a PC power supply in appearcnace and is pretty easy to replace. You can download the service manual and take a look at the procedure if you are inclined to do the repair yourself or have someone do it for you.

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***try to clean sensors: maybe it's dust on them.

Then if you are running latest Windows versions, you'll need a driver. Hp has dicontinued your plotter.

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