Top 10 Common Computer Troubleshooting Tips   Reboot The Computer Rebooting a computer almost never fixes the underlying problem, but it can quickly make your computer usable again (and get you off the tech support line), so tech support personal love this tip. You might have a computer black screen and they will still tell you to reboot your computer. Use A POST Card Every PC (and Intel, Macintosh ) performs a Power-On Self-Test (POST) check when it boots. As the computer checks each of its components, it sends a code to the PCI port on your motherboard. A cheap POST-code checker can show you what’s going on even if your computer doesn’t boot completely so that you can run a quick Google search to find out which part in your computer has failed. Minimal Reproduction