<human>:  How can I troubleshoot a computer that won't turn on?
<bot>: 
1. Begin by checking to make sure that the power source is connected and that the power switch is in the correct position.
2. If the power source is connected and the power switch is in the correct position, you may need to check the power cord and the wall outlet to make sure there is power flowing through them.
3. Examine the exterior of the computer to make sure everything is securely connected and that all hardware is inserted properly.
4. Check the internal components of the computer to make sure that all the necessary cables and connections are secure and properly seated.
5. Once you have inspected the computer, try to turn the system on again.
6. If the computer still does not turn on, then it may be necessary to seek professional help from a technician.