All the lights on the printer start to flicker. Then nothing prints. I restart the printer and after a page or so it does it again. I replaced the print heads and the test sheet prints out half way and the printer starts to flicker again. I searched the help section but according to HP when all the lights flicker it is an invalid condition. Is there any way of fixing this issue?
To be more precise:
All four cartridge lights, both printhead lights, the resume light, and the power light are all flickering. They are not blinking. They are just rapidly flickering.