HP Laserjet E87740 with black copy , print essue

[hani002]

Hi
i have HP laser MFP E87740 , print and copy solid Black when i use normal text
and print virtical color lines when i print or copy color pages.
HVPS replaced
HVPS Rails Replaced
Laser assemply unit Replaced
Firmware Updated
Problem not solved
Any Idea to repair? thanks

[techsxge]

Re: HP Laserjet E87740 with black copy , print essue

Solution:
Buy a Konica Minolta/Kyocera MFP.
Repairing HP after youve gone as far as changing eletronics doesnt make any sense on HP

[Crowfeather]

Necroposting but for anyone wondering solid coloured lines on print/copy is an imaging unit failure, you can see the markings on the drum if you remove it.

Also HP copiers are shit.