Each major part in this book ends with a troubleshooting chapter like this. The troubleshooting chapters provide quick solutions to common problems. That's about it. You won't catch me yammering on for paragraph after paragraph in these troubleshooting chapters!
If the computer does absolutely nothing when you first turn it on, your first move is to check all cable connections. Make sure the power plug on every device that plugs into the wall is firmly plugged in. Also, make sure the mouse, keyboard, and all other devices are firmly plugged into their slots.
If it's a desktop computer, look for a 0/1 power switch on the back of the computer and make sure it's on (flipped to the 1 position).
Turn on the computer again and as it's powering up, push the button on the floppy disk drive (if the computer has one) and the CD or DVD drive. If there is a disk in either drive, remove it.
If the computer sounds as though it's starting up but you don't see anything on the screen, make sure all plugs to the monitor are firmly seated. If it's a desktop computer, make sure the monitor's power cable is firmly attached to the monitor and wall socket, and that the cable connecting the computer to the monitor is firmly attached at both ends of the cable. Make sure the monitor is turned on. Then ...