Always remember to turn off your PC Turning off your PC before servicing any of its components should be your first step. Dont even open the system unless the power is turned off. Most PCs have numerous lights inside to serve definite functions so check to see that no lights are on. If any of these lights are still on, the power is not completely off. Also, it is always recommended to unplug the computer from power strip as another safety measure.Dont Use Capacitors Capacitors are small electronic devices used in many of the parts inside a computer. Capacitors have the capability to store electric charge for a short while after the power is turned off. Therefore, it is good to wait for a few minutes after pulling the plug before working on your computer.Never Service the Non-ServiceableWhen you see anything with a warning “No serviceable components inside”, always take it as a serious suggestion. There are some components in computer that are not meant to be fixed, even if you have the expertise or the most qualified tech support technicians at your side. The warning can generally be seen over power supply units. Most times, it is meant for sensitive components such as monitors, hard drives, and optical drives.