Lenovo Support Web siteTechnical support information is available on the Lenovo Support Web site at:http://www.lenovo.com/supportThis Web site is updated with the latest support information such as the following:• Drivers and software• Diagnostic solutions• Product and service warranty• Product and parts details• User guides and manuals• Knowledge base and frequently asked questions• Lenovo Support phone numbersFrequently asked questionsFor the answers to frequently asked questions about your computer, go to:http://www.lenovo.com/support/faqHelp and serviceThis section provides information about obtaining help and service.Calling for serviceDuring the warranty period, you can get help and information by telephone through the Customer SupportCenter. For the warranty period of your computer, go to http://www.lenovo.com/warranty-status. For a list ofLenovo Support phone numbers, go to http://www.lenovo.com/support/phone.Note: Phone numbers are subject to change without notice. If the number for your country or region is notprovided, contact your Lenovo reseller or Lenovo marketing representative.The following services are available during the warranty period:• Problem determination - Trained service personnel are available to assist you with determining ahardware problem and deciding what action is necessary to fix the problem.• Hardware repair - If the problem is caused by hardware under warranty, trained service personnel areavailable to provide the applicable level of service.• Engineering Change management - There might be changes that are required after a product has beensold. Lenovo or your reseller will make selected Engineering Changes (ECs) that apply to your hardwareavailable.These items are not covered by the warranty:• Replacement or use of parts not manufactured for or by Lenovo or non-warranted Lenovo parts• Identification of software problem sources• Configuration of BIOS as part of an installation or upgrade• Changes, modifications, or upgrades to device drivers• Installation and maintenance of network operating systems (NOS)• Installation and maintenance of programsIf possible, be at your computer when you call. Have the following information available:• Machine type and model• Serial numbers of your hardware products224 P720 Hardware Maintenance Manual