HP 2500 color only prints yellow?

Описание: The video describes how to reach the magnetic switch (solenoid switch) in a hp2500-laserprinter for to change the sticky felt. Before changing the felt, the printer sometimes was working correctly, sometimes the printings were only yellow or without color. It was also possible that words in blue came out in red! By printing the status pages sometimes the coloured charts of the "estimated pages remaining" were partially invisible.
After having inserted a new pad of felt, the printer worked fine again!
Thanks to "Jose Osuna's Blog" (14th of january 2012) and the fellows who are listed there!

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August 2023: My printer runs and runs and runs. Actually I took a thin piece of leather (if the material is to thick, the drum stucks, if it's to thin, the drum doesn't stop at the right position). Good luck!