How do I set up an HP Designjet 110plus to change the print head

SOURCE: Our hp designjet 110plus is not printing black

Hi,
Check whether the black cartridge is dry and whether it is releasing the ink properly.  This you can check by rubbing the paper on the place where the flows.
Else check with a new cartridge.  Even if the problem continues in the printer preferrence you have an option of service.  click on it and the problem will be fixed......!

SOURCE: hp designjet 500 does not work

You probably have a problem with dry ink in the service station. This is the "tank"on the right hand side of the plotter which collects all your wasre ink. I would have a guess that because of the long standing period this has dried and is preventing the station from moving and cleaning the heads. You will have to remove the right hand cover of the machine, then looking directly downwards just behind te display panel you will see two torx screws, loosen them. The service station can then be removed and cleaned. Be sure to disconnect the small plug on the service station motor and fan, also remove the motor and fan before cleaning the station with water under a tap. BEWARE this is a really messy job, your hands will be black (use dishwashing gloves) and it takes a really long time to clean it properly, wait for it to dry in the sun and re- assemble.
Good Luck
Dave

SOURCE: hp designjet 500 (42'')

1. remove your catridge
2. remove or change the foam which is located
at the bottom of catridge head
3. hope this will help you to solve your problem
thanks

SOURCE: How do I clean the HP designjet 110plus printhead

You need to go to the hp download site and download the System Maintenance Utility Software. Its free, but you need it before you can clean the print heads. also, for some reason it works best when hooked to the network, not directly to Computer.

SOURCE: how do i fix a faulty printerhead for the hp

are you getting a message failure? fix the printhead how? if the printhead is faulty then you need to replace it. if this does not resolve the issue then you may have a problem with the carriage assembly. clean the contacts of the printhead and the carriage assembly with a damp, lint free cloth (old t shirt works good and water) if this does not help, than your problem is with your carriage assembly, trailing cable, main pca. let me know if this helps, if not than i can help you further