Try checking the following things first
- Check that the computer and monitor are plugged into power
- Check that the video cable (can be multiple shapes and colors) is plugged into the computer and the monitor
- If the monitor has an amber standby light lit, you might just need to move your mouse on the mouse pad
- If that doesn't wake up the computer, check that the mouse and keyboard are plugged into your computer
- If your computer still won't turn on, call me (316-247-1225) or create a ticket