Important safety informationCAUTION:Before using this manual, be sure to read and understand all the related safety information for thisproduct. Refer to the information in this section and the safety information in the ThinkCentre Safetyand Warranty Guide that you received with this product. Reading and understanding this safetyinformation reduces the risk of personal injury and damage to your product.If you no longer have a copy of the ThinkCentre Safety and Warranty Guide, you can obtain a PortableDocument Format (PDF) version from the Lenovo® Support Web site at http://www.lenovo.com/support. TheLenovo Support Web site also provides the ThinkCentre Safety and Warranty Guide and this ThinkCentreUser Guide in additional languages.Service and upgradesDo not attempt to service a product yourself unless instructed to do so by the Customer Support Center oryour documentation. Only use a Service Provider who is approved to repair your particular product.Note: Some computer parts can be upgraded or replaced by the customer. Upgrades typically arereferred to as options. Replacement parts approved for customer installation are referred to as CustomerReplaceable Units, or CRUs. Lenovo provides documentation with instructions when it is appropriate forcustomers to install options or replace CRUs. You must closely follow all instructions when installing orreplacing parts. The Off state of a power indicator does not necessarily mean that voltage levels inside aproduct are zero. Before you remove the covers from a product equipped with a power cord, always makesure that the power is turned off and that the product is unplugged from any power source. For moreinformation on CRUs, refer to the ThinkCentre User Guide for this product. If you have any questions orconcerns, contact the Customer Support Center.Although there are no moving parts in your computer after the power cord has been disconnected, thefollowing warnings are required for your safety.DANGERHazardous moving parts. Keep fingers and other body parts away.CAUTION:Before replacing any CRUs, turn off the computer and wait three to five minutes to let the computercool before opening the cover.Static electricity preventionStatic electricity, although harmless to you, can seriously damage computer components and options.Improper handling of static-sensitive parts can cause damage to the part. When you unpack an option© Copyright Lenovo 2011 vii
