Laserjet Pro 400 M451DN NO MAGENTA

[davidzuts]

Well that takes the transfer belt out of the equation.  Still could be a high voltage issue, dc controller or even formatter issue.

[Elgato]

Do you know if the CP2025's share a lot of parts with these? They physically look the same.

[davidzuts]

They are both the same engine design but to be honest I think the parts that can cause your issue are all different part numbers.

[Elgato]

Parts are fairly plentiful. If you were going to start throwing parts at it, In what order would you try them?

Thanks

[davidzuts]

Since you say this started after a firmware update and you do get the solid magenta page with the contacts covered I would first replace the formatter.