Lenovo H105 User manual for 3000 H100 Series and H105 Series desktop systems - Page 38

Appendix Appendix Please read and follow all instructions on safety in this appendix. It will help you work comfortably, efficiently, and protect you and your computer. Helpful tips 1. The power supply of the computer at your home or office should be equipped with secure grounding. Make sure to use the threephase plug together with the three-phase socket with grounding. Do not change the standard power cable supplied with your computer. 2. To prevent possible shock hazard, please do not use your computer during a lightning storm. You should disconnect the power cable, network cable, and telephone cable. 3. Do not share an electrical outlet with other home electrical appliances with large power output; otherwise, there might be an unstable voltage output that could damage your computer or data. 4. This computer uses power supply. Please make sure your local current and voltage are correct. 5. Please do not plug or unplug any connection cables other than the USB and 1394 cable when the power is on, otherwise there might be damage to your computer. 6. To avoid possible damage to your devices, please do not disconnect your devices until 5 seconds after your computer is shut down. 7. The safest way to power off is to unplug your power supply. The off status of the power indicator does not necessary mean the voltage output is zero. 8. Please check your power cable and plug on a regular basis for any damage. And make sure the connection cables are not squeezed by any other objects. 9. Note sure about this sentence - It is strictly prohibited to change the battery on the system board without proper instructions from a trained service professional. Only use a battery that is recommended by the manufacturer. Dispose of the battery as required by the local ordinances or regulations. Static Electricity Prevention 1. All internal switches, memory modules, plugs, and other components are static-senstive. Your body may be in contact with these static-senstive devices when handling options and other components. To avoid damage to the parts, please touch a grounded device to discharge the static electricity in your body. 2. Before touching the parts with static-proof packing, discharge the static electricity in your body. Operating Environment 1. The optimal environmental temperature is 10~35 Celsius degree with a humidity of 35%~80%. Your computer should be located in a well-venitliated and dry area without direct exposure to sunshine. 2. Please keep other home appliances, such as an electric fan, radio, high-power speaker, air conditioner, and microwave oven away from your computer, because they may generate a strong magnetic field that can result in strong damage against the monitor and disk.