C2500 - Issues printing only yellow

[Stormhammer]

A C2500 in my area decided that it would stop printing anything that was yellow. Replaced the dev unit and dev as well as the drum unit itself and no change. Replaced the ITB transfer power pack and that didn't solve anything either. Forcing toner adds only a light bit at the start of a page and continues to become light the further you go down the page until it's stark white. I have designs to replace the other transfer power pack to see if that changes anything. I suspect the ITB itself may be defective as well since I recently changed the ITB due to the ITB belt itself tearing apart in the machine. Any thoughts that might steer me in a cheaper direction are welcomed.

[FrohnB]

Take transfer belt off of ITB unit, and check for a wire that is damaged/broken. Have had this on a couple machines.

[Stormhammer]

Take transfer belt off of ITB unit, and check for a wire that is damaged/broken. Have had this on a couple machines.

I figured this might be the case. The only ITB units I could get were from other machines and not brand new ones. I should have checked that in the first place but sometimes lack of due diligence can lead you down some weird troubleshooting rabbit holes.

[slimslob]

Also check that the yellow transfer roller is not sticking in the down position.

[Stormhammer]

Slimslob has psychic powers, apparently. That's precisely what it was. One of the plastic bushings on one side was stuck pushing the roller in the down position.

[slimslob]

Slimslob has psychic powers, apparently. That's precisely what it was. One of the plastic bushings on one side was stuck pushing the roller in the down position.

Encountered the problem before.