I have a HP DesignJet 750C Plus (E/A0) plotter. It worked ok for a while, but when i update the memory its stop to work and also the mainbord fan not working .. i unplug the RAM and
tried again with out any RAMs but its still not working and the control panel screen is black
i think the new RAM was have error and damage the Formatter mainboard !!!
Any ideas, suggestions?