iMac Troubleshooting Steps
Part of the iMac For Dummies Cheat Sheet
Anyone can troubleshoot, so if you run into a problem with your iMac, don't be dismayed! Follow these troubleshooting steps to get your iMac back up and running.
Check all cables.
Investigate recent changes you made to your hardware or software.
Run Disk Utility and repair your volume(s) and disk permissions.
Check the contents of your Trash for files you might have deleted accidentally.
Check your Internet, wireless, and network connections to make sure they're still working.
Run a virus scan, using your antivirus application.
Disable your account's Login Items and reboot.
Turn off your screen saver.
Run System Information and check the status of your hardware.