unknownasked Dec 4, 2009 at 4:28pm
HP Color Laserjet 2840 Prints only one color (Yel)
2018 and it is still helpful, thanks for yours advices.
I agree as well. The repair was relatively easy. It took about two hours from start to finish and test. The selonoid is on the top of the unit on the right side (if facing the front). It has two very small yellow wires connected to it. You will have to remove the top and right side, as well as the electronics board to remove the solenoid and repair it. The repair includes, removing existing goo, and placing black electrical tape where the goo was.
After struggling for hours to fix the only print yellow problem, I came across this link. Took some effort since I am not a printer repair person, but got the solenoid removed and cleaned off the old foam tape and residue with an X-acto knife and goo-gone. Wiped the surface clean and added two layers of trimmed electrical tape where the old foam tape was. Reassembled the unit and it works!!. Thank you so much.