Computer keeps going to sleep even though it is set up not to

Question

I recently helped a friend set up his iMac to stream to his home stereo system so things like Pandora could be played throughout the house. The problem we are having is his computer keeps going to sleep and back to the log-in screen. In energy saver, we set the computer and display to never go to sleep. We also un-checked the box that says "put the hard disks to sleep when possible." Even after doing this, the display still goes dark and when the mouse is moved to turn the screen on it is back at the log in screen. This causes pandora to stop playback, which is not good since this is why we set up the streaming in the first place. Why is the computer still going to sleep when we are telling it to never do so?

Answer 1

HI Ty,
Couldn't hurt to check the hard disk.
Follow these instructions to verify the hard disk for errors:
Open Disk Utility, in the Utilities folder in the Applications folder.
Select your disk, and click First Aid.
Click Verify Disk.
If the disk needs repairs, do one of the following:
Insert your Mac OS X Install disc in your computer’s optical drive or an optical drive connected to your computer, and then restart your computer. When you hear the startup tone, hold down the C key until you see the progress indicator, which looks like a spinning gear.
Follow the onscreen instructions until the menu bar appears with the Utilities menu in it, choose Utilities > Disk Utility, click First Aid, and then click Repair Disk. When Disk Utility is finished, from the Menu Bar select Utilities/Startup Disk. Select MacintoshHD 10.5 in the window and click: Restart
If you don’t have a Mac OS X Install disc, restart your computer while holding down the Shift key. As your computer starts up, it performs a disk check similar to the one Disk Utility performs.
Carolyn