Reading and understanding this safety information reduces the risk of personal injury and damage to your product. Danger: Beware of extremely hazardous or lethal situations. Attention: Beware of possible damage to programs, devices, or data. Note: Pay attention to this important information. © Copyright Lenovo 2010. 31044392_Q150_UG_EN_V1.0.indd 1 2010.4.20 10:46:45 AM 31044392_Q150_UG_EN_V1.0.indd 2 2010.4.20 10:46:45 AM Contents Important Safety Information Chapter 1 Using the Computer Hardwar

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There are three LEDs to help you determine if the power supply and system board are working correctly. A power button LED is located on the front of the computer and two diagnostic LEDs are located on the power supply at the rear of the computer. a. Disconnect the power cord from the electrical outlet. b. Reconnect the power cord to a working electrical outlet. c. Press the power button. © Lenovo 2005. Portions © IBM Corp. 2005. 45 d. Observe the LEDs and refer to the following table. Power LED

Document OutlineAbout this manualChapter 1. Read this first: Important safety informationPower cords and power adaptersGeneral safetyElectrical safetySafety

Observe the following rules when working on electrical equipment.Important: Use only approved tools and test equipment. Some hand tools have handles covered