asked Mar 14, 2013 at 8:46am
Hp HP DeskJet Plus

HP Designjet 750C Plus (C4709B) problems

I have a Designjet 750C Plus (C4709B) that show the "Switch Power off, Check Cartridge Path" message during the "Initializing" phase. I have replaced the belt since it had disintegrated. I have tried to get to the service menu by pressing the "Enter" and "Up Arrow" keys while turning on to no avail. What direction should I turn to next?