Recently I did a service call for a third-party company to replace an HVPS (high voltage power supply) in an HP M3035 printer for one of their customers. When I arrived onsite and printed a config page the background was so dark it was difficult to read the print on the paper. After talking to the customer, I found out that several technicians had been out there and had replaced various parts. Knowing the third-party company I went ahead and replaced the HVPS per my instructions.
After replacing the HVPS I turned the machine back on and printed a few pages. While the print looked better it was light. I checked the settings to make sure the density was set correctly and econo-mode was turned off. I turned the machine off and back on thinking that maybe a power off then on would fix the problem. To my unwanted surprise the dark background was back. Continue reading