Hi dankurt,
Welcome to the HP Forums!
For you to have the best experience in the HP forum, I would like to direct your attention to the HP Forums Guide First Time Here? Learn How to Post and More.
Thank you for your query, I am glad to be of assistance.
Just to let you know, this is an English forum. I used Google translate to read your post.
I understand you have an issue with the fan. Here is a link to System Fan (90b) error message on startup. If you require further assistance, would you please provide your exact model of computer and the operating system you are running. How Do I Find My Model Number or Product Number?
