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designjet t790 wont initialise, and asks to reset but cant get to the menu

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HP Designjet T790



Ive recently bought a HP DesignJet T790 Plotter. when starting the menu the printer will not initialise, and asks for it to be reset, however im not sure how to reset it as i cant access any menus. 


theres no error code or anything. 


i've turned it off and on, and held in the power button for 30 seconds, but no good. 


The LED 1 is flashing orange, and no. 2 & 3 are showing a constant orange light if this helps. 


Any help would be greatly appreciated.  

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