Lenovo Safety and General Information Guide - Manual (Page 48)

If your product is not working correctly,
DO NOT RETURN IT TO THE STORE.
For technical assistance, contact a Lenovo
support specialist 24 hours a day by calling toll
free
1-877-4 LENOVO (1-877-453-6686).
Additionally, you can find support information
and updates on the Lenovo Web site located at
http://support.lenovo.com.
* Only for the users from the United States.