Hello YuriEmelianov, thanks for contacting us through the Intel Communities.
Since you already know your motherboard is defective and it is necessary to replace it, the following link will provide you the list of phone numbers for our warranty department. Contact Support
However I was able to find this list that might be helpful for you
- Email support https://supportmail.intel.com/scripts-emf/welcome.aspx?id=39
- Chat support https://sales.liveperson.net/hc/56727252/?cmd=file&file=visitorWantsToChat&site=56727252&byhref=1&SESSIONVAR!skill=ics-ww-tech-desktop-english
- Phone support
Please have the AA# and serial number of the motherboard at hand, because they will request this information in order to set up the RMA. http://www.intel.com/support/motherboards/desktop/sb/CS-009008.htm